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F Ruppin - One of the best experts on this subject based on the ideXlab platform.
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cosmological implications of a modified galaxy cluster Pressure Profile using the planck tsz power spectrum
Epj Web of Conferences, 2020Co-Authors: F Ruppin, F Mayet, J F Maciasperez, L PerottoAbstract:The mean Pressure Profile of the cluster population is a key element in cosmological analyses based on surveys of galaxy clusters observed through the Sunyaev-Zel’dovich (SZ) effect. A variation of both the shape and the amplitude of this Profile could explain part of the discrepancy currently observed between the cosmological constraints obtained from the analyses of the CMB primary anisotropies and those from cluster abundance in SZ surveys for a fixed mass bias parameter. We study the cosmological implications of a modification of the mean Pressure Profile through the analysis of the SZ power spectrum measured by Planck . We define two mean Pressure Profiles on either side of the one obtained from the observation of nearby clusters by Planck . The parameters of these Profiles are chosen to ensure their compatibility with the distributions of Pressure and gas mass fraction Profiles observed at low redshift. We find significant differences between the cosmological parameters obtained by using these two Profiles to fit the Planck SZ power spectrum and those found in previous analyses. We conclude that a ∼15% decrease of the amplitude of the mean normalized Pressure Profile is sufficient to alleviate the discrepancy observed between the constraints of σ8 and Ωm from the CMB and cluster analyses.
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cosmological implications of a modified galaxy cluster Pressure Profile using the planck tsz power spectrum
arXiv: Cosmology and Nongalactic Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, L PerottoAbstract:The mean Pressure Profile of the cluster population is a key element in cosmological analyses based on surveys of galaxy clusters observed through the Sunyaev-Zel'dovich (SZ) effect. A variation of both the shape and the amplitude of this Profile could explain part of the discrepancy currently observed between the cosmological constraints obtained from the analyses of the CMB primary anisotropies and those from cluster abundance in SZ surveys for a fixed mass bias parameter. We study the cosmological implications of a modification of the mean Pressure Profile through the analysis of the SZ power spectrum measured by $Planck$. We define two mean Pressure Profiles on either side of the one obtained from the observation of nearby clusters by $Planck$. The parameters of these Profiles are chosen to ensure their compatibility with the distributions of Pressure and gas mass fraction Profiles observed at low redshift. We find significant differences between the cosmological parameters obtained by using these two Profiles to fit the $Planck$ SZ power spectrum and those found in previous analyses. We conclude that a ${\sim}15\%$ decrease of the amplitude of the mean normalized Pressure Profile is sufficient to alleviate the discrepancy observed between the constraints of $\sigma_8$ and $\Omega_m$ from the CMB and cluster analyses.
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impact of icm disturbances on the mean Pressure Profile of galaxy clusters a prospective study of the nika2 sz large program with music synthetic clusters
Astronomy and Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, R Adam, Federico Sembolini, M De Petris, Giammarco Cialone, L PerottoAbstract:Context. The mean Pressure Profile of the galaxy cluster population plays an essential role in cosmological analyses. An accurate characterization of the shape, intrinsic scatter, and redshift evolution of this Profile is necessary to estimate some of the biases and systematic effects that currently prevent cosmological analyses based on thermal Sunyaev-Zel’dovich (tSZ) surveys from obtaining precise and unbiased cosmological constraints. This is one of the main goals of the ongoing NIKA2 SZ large program, which aims at mapping the tSZ signal of a representative cluster sample selected from the Planck and ACT catalogs and spans a redshift range 0.5 < z < 0.9.Aims. To estimate the impact of intracluster medium (ICM) disturbances that can be detected by NIKA2 on the mean Pressure Profile of galaxy clusters, we realized a study based on a synthetic cluster sample that is similar to that of the NIKA2 SZ large program.Methods. To reach this goal we employed the hydrodynamical N-body simulation Marenostrum MUltidark SImulations of galaxy Clusters (MUSIC). We simulated realistic NIKA2 and Planck tSZ observations, which were jointly analyzed to estimate the ICM Pressure Profile of each cluster. A comparison of the deprojected Profiles with the true radial Profiles directly extracted from the MUSIC simulation allowed us to validate the NIKA2 tSZ pipeline and to study the impact of ICM disturbances on the characterization of the ICM Pressure distribution even at high redshift. After normalizing each Profile by the integrated quantities estimated under the hydrostatic equilibrium hypothesis, we evaluated the mean Pressure Profile of the twin sample and show that it is compatible with that extracted directly from the MUSIC simulation in the scale range that can be recovered by NIKA2. We studied the impact of cluster dynamical state on both its shape and associated scatter.Results. We observe that at R500 the scatter of the distribution of normalized Pressure Profiles associated with the selected morphologically disturbed clusters is 65% larger than that associated with relaxed clusters. Furthermore, we show that using a basic modeling of the thermal Pressure distribution in the deprojection procedure induces a significant increase of the scatter associated with the mean normalized Pressure Profile compared to the true distribution extracted directly from the simulation.Conclusions. We conclude that the NIKA2 SZ large program will facilitate characterization of the potential redshift evolution of the mean Pressure Profile properties due to the performance of the NIKA2 camera, thereby allowing for a precise measurement of cluster morphology and ICM thermodynamic properties up to R500 at high redshift.Key words: instrumentation: high angular resolution / galaxies: clusters: intracluster medium
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impact of icm disturbances on the mean Pressure Profile of galaxy clusters a prospective study of the nika2 sz large program with music synthetic clusters
arXiv: Cosmology and Nongalactic Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, R Adam, Federico Sembolini, M De Petris, Giammarco Cialone, L PerottoAbstract:$Context$. The mean Pressure Profile of the galaxy cluster population plays an essential role in cosmological analyses. An accurate characterization of the shape, intrinsic scatter, and redshift evolution of this Profile is necessary to estimate some of the biases and systematic effects that currently prevent cosmological analyses based on thermal Sunyaev-Zel'dovich (tSZ) surveys from obtaining precise and unbiased cosmological constraints. This is one of the main goals of the ongoing NIKA2 SZ large program, which aims at mapping the tSZ signal of a representative cluster sample selected from the $Planck$ and ACT catalogs and spans a redshift range $0.5 < z < 0.9$. $Aims$. To estimate the impact of intracluster medium (ICM) disturbances that can be detected by NIKA2 on the mean Pressure Profile of galaxy clusters, we realized a study based on a synthetic cluster sample that is similar to that of the NIKA2 SZ large program. $Methods$. To reach this goal we employed the hydrodynamical simulation $Marenostrum~MUltidark~SImulations~of~galaxy~Clusters$ (MUSIC). We simulated realistic NIKA2 and $Planck$ tSZ observations, which were jointly analyzed to estimate the ICM Pressure Profile of each cluster. A comparison of the deprojected Profiles with the true radial Profiles directly extracted from the MUSIC simulation allowed us to validate the NIKA2 tSZ pipeline and to study the impact of ICM disturbances on the characterization of the ICM Pressure distribution even at high redshift. After normalizing each Profile by the integrated quantities estimated under the hydrostatic equilibrium hypothesis, we evaluated the mean Pressure Profile of the twin sample and show that it is compatible with that extracted directly from the MUSIC simulation in the scale range that can be recovered by NIKA2. We studied the impact of cluster dynamical state on both its shape and associated scatter. (abridged)
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Impact of the mean Pressure Profile of galaxy clusters on the cosmological constraints from the $Planck$ tSZ power spectrum
Mon.Not.Roy.Astron.Soc., 2019Co-Authors: F Ruppin, F Mayet, J.f. Macías-pérez, L PerottoAbstract:Cosmological analyses based on surveys of galaxy clusters observed through the Sunyaev–Zel’dovich (SZ) effect strongly rely on the mean Pressure Profile of the cluster population. A tension is currently observed between the cosmological constraints obtained from the analyses of the CMB primary anisotropies and those from cluster abundance in SZ surveys. This discrepancy may be explained by a wrong estimate of the hydrostatic bias parameter that links the hydrostatic mass to the true mass of galaxy clusters. However, a variation of both the amplitude and the shape of the mean Pressure Profile could also explain part of this tension. We analyse the effects of a modification of this Profile on the constraints of the σ_8 and Ω_m parameters through the analysis of the SZ power spectrum measured by the Planck collaboration. We choose two mean Pressure Profiles that are respectively lower and higher than the one obtained from the observation of nearby clusters by Planck. The selection of the parameters of these two Profiles is based on the current estimates of the Pressure and gas mass fraction Profile distributions at low redshift. The cosmological parameters found for these two Profiles are significantly different from the ones obtained with the Planck Pressure Profile. We conclude that an |${\sim }15{{\ \rm per\ cent}}$| decrease of the amplitude of the mean normalized Pressure Profile would alleviate the tension observed between the constraints of σ_8 and Ω_m from the CMB and cluster analyses without requiring extreme values of the mass bias parameter.
R Adam - One of the best experts on this subject based on the ideXlab platform.
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impact of icm disturbances on the mean Pressure Profile of galaxy clusters a prospective study of the nika2 sz large program with music synthetic clusters
Astronomy and Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, R Adam, Federico Sembolini, M De Petris, Giammarco Cialone, L PerottoAbstract:Context. The mean Pressure Profile of the galaxy cluster population plays an essential role in cosmological analyses. An accurate characterization of the shape, intrinsic scatter, and redshift evolution of this Profile is necessary to estimate some of the biases and systematic effects that currently prevent cosmological analyses based on thermal Sunyaev-Zel’dovich (tSZ) surveys from obtaining precise and unbiased cosmological constraints. This is one of the main goals of the ongoing NIKA2 SZ large program, which aims at mapping the tSZ signal of a representative cluster sample selected from the Planck and ACT catalogs and spans a redshift range 0.5 < z < 0.9.Aims. To estimate the impact of intracluster medium (ICM) disturbances that can be detected by NIKA2 on the mean Pressure Profile of galaxy clusters, we realized a study based on a synthetic cluster sample that is similar to that of the NIKA2 SZ large program.Methods. To reach this goal we employed the hydrodynamical N-body simulation Marenostrum MUltidark SImulations of galaxy Clusters (MUSIC). We simulated realistic NIKA2 and Planck tSZ observations, which were jointly analyzed to estimate the ICM Pressure Profile of each cluster. A comparison of the deprojected Profiles with the true radial Profiles directly extracted from the MUSIC simulation allowed us to validate the NIKA2 tSZ pipeline and to study the impact of ICM disturbances on the characterization of the ICM Pressure distribution even at high redshift. After normalizing each Profile by the integrated quantities estimated under the hydrostatic equilibrium hypothesis, we evaluated the mean Pressure Profile of the twin sample and show that it is compatible with that extracted directly from the MUSIC simulation in the scale range that can be recovered by NIKA2. We studied the impact of cluster dynamical state on both its shape and associated scatter.Results. We observe that at R500 the scatter of the distribution of normalized Pressure Profiles associated with the selected morphologically disturbed clusters is 65% larger than that associated with relaxed clusters. Furthermore, we show that using a basic modeling of the thermal Pressure distribution in the deprojection procedure induces a significant increase of the scatter associated with the mean normalized Pressure Profile compared to the true distribution extracted directly from the simulation.Conclusions. We conclude that the NIKA2 SZ large program will facilitate characterization of the potential redshift evolution of the mean Pressure Profile properties due to the performance of the NIKA2 camera, thereby allowing for a precise measurement of cluster morphology and ICM thermodynamic properties up to R500 at high redshift.Key words: instrumentation: high angular resolution / galaxies: clusters: intracluster medium
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impact of icm disturbances on the mean Pressure Profile of galaxy clusters a prospective study of the nika2 sz large program with music synthetic clusters
arXiv: Cosmology and Nongalactic Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, R Adam, Federico Sembolini, M De Petris, Giammarco Cialone, L PerottoAbstract:$Context$. The mean Pressure Profile of the galaxy cluster population plays an essential role in cosmological analyses. An accurate characterization of the shape, intrinsic scatter, and redshift evolution of this Profile is necessary to estimate some of the biases and systematic effects that currently prevent cosmological analyses based on thermal Sunyaev-Zel'dovich (tSZ) surveys from obtaining precise and unbiased cosmological constraints. This is one of the main goals of the ongoing NIKA2 SZ large program, which aims at mapping the tSZ signal of a representative cluster sample selected from the $Planck$ and ACT catalogs and spans a redshift range $0.5 < z < 0.9$. $Aims$. To estimate the impact of intracluster medium (ICM) disturbances that can be detected by NIKA2 on the mean Pressure Profile of galaxy clusters, we realized a study based on a synthetic cluster sample that is similar to that of the NIKA2 SZ large program. $Methods$. To reach this goal we employed the hydrodynamical simulation $Marenostrum~MUltidark~SImulations~of~galaxy~Clusters$ (MUSIC). We simulated realistic NIKA2 and $Planck$ tSZ observations, which were jointly analyzed to estimate the ICM Pressure Profile of each cluster. A comparison of the deprojected Profiles with the true radial Profiles directly extracted from the MUSIC simulation allowed us to validate the NIKA2 tSZ pipeline and to study the impact of ICM disturbances on the characterization of the ICM Pressure distribution even at high redshift. After normalizing each Profile by the integrated quantities estimated under the hydrostatic equilibrium hypothesis, we evaluated the mean Pressure Profile of the twin sample and show that it is compatible with that extracted directly from the MUSIC simulation in the scale range that can be recovered by NIKA2. We studied the impact of cluster dynamical state on both its shape and associated scatter. (abridged)
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first sunyaev zel dovich mapping with the nika2 camera implication of cluster substructures for the Pressure Profile and mass estimate
Astronomy and Astrophysics, 2018Co-Authors: F Ruppin, M Arnaud, G W Pratt, F Mayet, R Adam, Pascale Andre, H Aussel, I Bartalucci, Peter A R Ade, A BeelenAbstract:The complete characterization of the Pressure Profile of high-redshift galaxy clusters, from their core to their outskirts, is a major issue for the study of the formation of large-scale structures. It is essential to constrain a potential redshift evolution of both the slope and scatter of the mass-observable scaling relations used in cosmology studies based on cluster statistics. In this paper, we present the first thermal Sunyaev–Zel’dovich (tSZ) mapping of a cluster from the sample of the New IRAM Kids Arrays (NIKA2) SZ large program that aims at constraining the redshift evolution of cluster Pressure Profiles and the tSZ-mass scaling relation. We observed the galaxy cluster PSZ2 G144.83+25.11 at redshift z = 0.58 with the NIKA2 camera, a dual-band (150 and 260 GHz) instrument operated at the Institut de Radioastronomie Millimtrique (IRAM) 30-m telescope. We identify a thermal Pressure excess in the south-west region of PSZ2 G144.83+25.11 and a high-redshift sub-millimeter point source that affect the intracluster medium (ICM) morphology of the cluster. The NIKA2 data are used jointly with tSZ data acquired by the Multiplexed SQUID/TES Array at Ninety Gigahertz (MUSTANG), Bolocam, and Planck experiments in order to non-parametrically set the best constraints on the electronic Pressure distribution from the cluster core (R ~ 0.02R500) to its outskirts (R ~ 3R500). We investigate the impact of the over-Pressure region on the shape of the Pressure Profile and on the constraints on the integrated Compton parameter Y500. A hydrostatic mass analysis is also performed by combining the tSZ-constrained Pressure Profile with the deprojected electronic density Profile from XMM-Newton. This allows us to conclude that the estimates of Y500 and M500 obtained from the analysis with and without masking the disturbed ICM region differ by 65% and 79%, respectively. This work highlights that NIKA2 will have a crucial impact on the characterization of the scatter of the Y500−M500 scaling relation due to its high potential to constrain the thermodynamic and morphological properties of the ICM when used in synergy with X-ray observations of similar angular resolution. This study also presents the typical products that will be delivered to the community for all clusters included in the NIKA2 tSZ Large Program.Key words: galaxies: clusters: intracluster medium / cosmology: observations / instrumentation: high angular resolution
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a multi instrument non parametric reconstruction of the electron Pressure Profile in the galaxy cluster clj1226 9 3332
Astronomy and Astrophysics, 2018Co-Authors: C. Romero, J F Maciasperez, R Adam, H Aussel, M. Mcwilliam, P. André, Peter A R Ade, A BeelenAbstract:Context . In the past decade, sensitive, resolved Sunyaev-Zel’dovich (SZ) studies of galaxy clusters have become common. Whereas many previous SZ studies have parameterized the Pressure Profiles of galaxy clusters, non-parametric reconstructions will provide insights into the thermodynamic state of the intracluster medium.Aim . We seek to recover the non-parametric Pressure Profiles of the high redshift (z = 0.89) galaxy cluster CLJ 1226.9+3332 as inferred from SZ data from the MUSTANG, NIKA, Bolocam, and Planck instruments, which all probe different angular scales.Methods . Our non-parametric algorithm makes use of logarithmic interpolation, which under the assumption of ellipsoidal symmetry is analytically integrable. For MUSTANG, NIKA, and Bolocam we derive a non-parametric Pressure Profile independently and find good agreement among the instruments. In particular, we find that the non-parametric Profiles are consistent with a fitted generalized Navaro-Frenk-White (gNFW) Profile. Given the ability of Planck to constrain the total signal, we include a prior on the integrated Compton Y parameter as determined by Planck .Results . For a given instrument, constraints on the Pressure Profile diminish rapidly beyond the field of view. The overlap in spatial scales probed by these four datasets is therefore critical in checking for consistency between instruments. By using multiple instruments, our analysis of CLJ 1226.9+3332 covers a large radial range, from the central regions to the cluster outskirts: 0.05 R 500 500 . This is a wider range of spatial scales than is typically recovered by SZ instruments. Similar analyses will be possible with the new generation of SZ instruments such as NIKA2 and MUSTANG2.
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A multi-instrument non-parametric reconstruction of the electron Pressure Profile in the galaxy cluster CLJ1226.9+3332
Astron.Astrophys., 2018Co-Authors: C. Romero, J.f. Macías-pérez, R Adam, H Aussel, A Beelen, M. Mcwilliam, P. Ade, P. André, A. Benoît, A. BideaudAbstract:Context. In the past decade, sensitive, resolved Sunyaev-Zel’dovich (SZ) studies of galaxy clusters have become common. Whereas many previous SZ studies have parameterized the Pressure Profiles of galaxy clusters, non-parametric reconstructions will provide insights into the thermodynamic state of the intracluster medium.Aim. We seek to recover the non-parametric Pressure Profiles of the high redshift (z = 0.89) galaxy cluster CLJ 1226.9+3332 as inferred from SZ data from the MUSTANG, NIKA, Bolocam, and Planck instruments, which all probe different angular scales.Methods. Our non-parametric algorithm makes use of logarithmic interpolation, which under the assumption of ellipsoidal symmetry is analytically integrable. For MUSTANG, NIKA, and Bolocam we derive a non-parametric Pressure Profile independently and find good agreement among the instruments. In particular, we find that the non-parametric Profiles are consistent with a fitted generalized Navaro-Frenk-White (gNFW) Profile. Given the ability of Planck to constrain the total signal, we include a prior on the integrated Compton Y parameter as determined by Planck.Results. For a given instrument, constraints on the Pressure Profile diminish rapidly beyond the field of view. The overlap in spatial scales probed by these four datasets is therefore critical in checking for consistency between instruments. By using multiple instruments, our analysis of CLJ 1226.9+3332 covers a large radial range, from the central regions to the cluster outskirts: 0.05 R500 < r < 1.1 R500. This is a wider range of spatial scales than is typically recovered by SZ instruments. Similar analyses will be possible with the new generation of SZ instruments such as NIKA2 and MUSTANG2.Key words: galaxies: clusters: individual: CLJ 1226.9+3332
A Beelen - One of the best experts on this subject based on the ideXlab platform.
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first sunyaev zel dovich mapping with the nika2 camera implication of cluster substructures for the Pressure Profile and mass estimate
Astronomy and Astrophysics, 2018Co-Authors: F Ruppin, M Arnaud, G W Pratt, F Mayet, R Adam, Pascale Andre, H Aussel, I Bartalucci, Peter A R Ade, A BeelenAbstract:The complete characterization of the Pressure Profile of high-redshift galaxy clusters, from their core to their outskirts, is a major issue for the study of the formation of large-scale structures. It is essential to constrain a potential redshift evolution of both the slope and scatter of the mass-observable scaling relations used in cosmology studies based on cluster statistics. In this paper, we present the first thermal Sunyaev–Zel’dovich (tSZ) mapping of a cluster from the sample of the New IRAM Kids Arrays (NIKA2) SZ large program that aims at constraining the redshift evolution of cluster Pressure Profiles and the tSZ-mass scaling relation. We observed the galaxy cluster PSZ2 G144.83+25.11 at redshift z = 0.58 with the NIKA2 camera, a dual-band (150 and 260 GHz) instrument operated at the Institut de Radioastronomie Millimtrique (IRAM) 30-m telescope. We identify a thermal Pressure excess in the south-west region of PSZ2 G144.83+25.11 and a high-redshift sub-millimeter point source that affect the intracluster medium (ICM) morphology of the cluster. The NIKA2 data are used jointly with tSZ data acquired by the Multiplexed SQUID/TES Array at Ninety Gigahertz (MUSTANG), Bolocam, and Planck experiments in order to non-parametrically set the best constraints on the electronic Pressure distribution from the cluster core (R ~ 0.02R500) to its outskirts (R ~ 3R500). We investigate the impact of the over-Pressure region on the shape of the Pressure Profile and on the constraints on the integrated Compton parameter Y500. A hydrostatic mass analysis is also performed by combining the tSZ-constrained Pressure Profile with the deprojected electronic density Profile from XMM-Newton. This allows us to conclude that the estimates of Y500 and M500 obtained from the analysis with and without masking the disturbed ICM region differ by 65% and 79%, respectively. This work highlights that NIKA2 will have a crucial impact on the characterization of the scatter of the Y500−M500 scaling relation due to its high potential to constrain the thermodynamic and morphological properties of the ICM when used in synergy with X-ray observations of similar angular resolution. This study also presents the typical products that will be delivered to the community for all clusters included in the NIKA2 tSZ Large Program.Key words: galaxies: clusters: intracluster medium / cosmology: observations / instrumentation: high angular resolution
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a multi instrument non parametric reconstruction of the electron Pressure Profile in the galaxy cluster clj1226 9 3332
Astronomy and Astrophysics, 2018Co-Authors: C. Romero, J F Maciasperez, R Adam, H Aussel, M. Mcwilliam, P. André, Peter A R Ade, A BeelenAbstract:Context . In the past decade, sensitive, resolved Sunyaev-Zel’dovich (SZ) studies of galaxy clusters have become common. Whereas many previous SZ studies have parameterized the Pressure Profiles of galaxy clusters, non-parametric reconstructions will provide insights into the thermodynamic state of the intracluster medium.Aim . We seek to recover the non-parametric Pressure Profiles of the high redshift (z = 0.89) galaxy cluster CLJ 1226.9+3332 as inferred from SZ data from the MUSTANG, NIKA, Bolocam, and Planck instruments, which all probe different angular scales.Methods . Our non-parametric algorithm makes use of logarithmic interpolation, which under the assumption of ellipsoidal symmetry is analytically integrable. For MUSTANG, NIKA, and Bolocam we derive a non-parametric Pressure Profile independently and find good agreement among the instruments. In particular, we find that the non-parametric Profiles are consistent with a fitted generalized Navaro-Frenk-White (gNFW) Profile. Given the ability of Planck to constrain the total signal, we include a prior on the integrated Compton Y parameter as determined by Planck .Results . For a given instrument, constraints on the Pressure Profile diminish rapidly beyond the field of view. The overlap in spatial scales probed by these four datasets is therefore critical in checking for consistency between instruments. By using multiple instruments, our analysis of CLJ 1226.9+3332 covers a large radial range, from the central regions to the cluster outskirts: 0.05 R 500 500 . This is a wider range of spatial scales than is typically recovered by SZ instruments. Similar analyses will be possible with the new generation of SZ instruments such as NIKA2 and MUSTANG2.
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A multi-instrument non-parametric reconstruction of the electron Pressure Profile in the galaxy cluster CLJ1226.9+3332
Astron.Astrophys., 2018Co-Authors: C. Romero, J.f. Macías-pérez, R Adam, H Aussel, A Beelen, M. Mcwilliam, P. Ade, P. André, A. Benoît, A. BideaudAbstract:Context. In the past decade, sensitive, resolved Sunyaev-Zel’dovich (SZ) studies of galaxy clusters have become common. Whereas many previous SZ studies have parameterized the Pressure Profiles of galaxy clusters, non-parametric reconstructions will provide insights into the thermodynamic state of the intracluster medium.Aim. We seek to recover the non-parametric Pressure Profiles of the high redshift (z = 0.89) galaxy cluster CLJ 1226.9+3332 as inferred from SZ data from the MUSTANG, NIKA, Bolocam, and Planck instruments, which all probe different angular scales.Methods. Our non-parametric algorithm makes use of logarithmic interpolation, which under the assumption of ellipsoidal symmetry is analytically integrable. For MUSTANG, NIKA, and Bolocam we derive a non-parametric Pressure Profile independently and find good agreement among the instruments. In particular, we find that the non-parametric Profiles are consistent with a fitted generalized Navaro-Frenk-White (gNFW) Profile. Given the ability of Planck to constrain the total signal, we include a prior on the integrated Compton Y parameter as determined by Planck.Results. For a given instrument, constraints on the Pressure Profile diminish rapidly beyond the field of view. The overlap in spatial scales probed by these four datasets is therefore critical in checking for consistency between instruments. By using multiple instruments, our analysis of CLJ 1226.9+3332 covers a large radial range, from the central regions to the cluster outskirts: 0.05 R500 < r < 1.1 R500. This is a wider range of spatial scales than is typically recovered by SZ instruments. Similar analyses will be possible with the new generation of SZ instruments such as NIKA2 and MUSTANG2.Key words: galaxies: clusters: individual: CLJ 1226.9+3332
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first sunyaev zel dovich mapping with nika2 implication of cluster substructures on the Pressure Profile and mass estimate
arXiv: Cosmology and Nongalactic Astrophysics, 2017Co-Authors: F Ruppin, M Arnaud, G W Pratt, F Mayet, R Adam, P A R Ade, Pascale Andre, H Aussel, I Bartalucci, A BeelenAbstract:The complete characterization of the Pressure Profile of high-redshift galaxy clusters, from their core to their outskirts, is a major issue for the study of the formation of large-scale structures. It is essential to constrain a potential redshift evolution of both the slope and scatter of the mass-observable scaling relations used in cosmology studies based on cluster statistics. In this paper, we present the first thermal Sunyaev-Zel'dovich (tSZ) mapping of a cluster from the sample of the NIKA2 SZ large program that aims at constraining the redshift evolution of cluster Pressure Profiles and the tSZ-mass scaling relation. We have observed the galaxy cluster PSZ2 G144.83+25.11 at redshift $z=0.58$ with the NIKA2 camera, a dual-band (150 and 260 GHz) instrument operated at the IRAM 30-meter telescope. We identify a thermal Pressure excess in the south-west region of PSZ2 G144.83+25.11 and a high redshift sub-millimeter point source that affect the intracluster medium (ICM) morphology of the cluster. The NIKA2 data are used jointly with tSZ data acquired by the MUSTANG, Bolocam and $Planck$ experiments in order to non-parametrically set the best constraints on the electronic Pressure distribution from the cluster core ($\rm{R} \sim 0.02 \rm{R_{500}}$) to its outskirts ($\rm{R} \sim 3 \rm{R_{500}} $). We investigate the impact of the over-Pressure region on the shape of the Pressure Profile and on the constraints on the integrated Compton parameter $\rm{Y_{500}}$. A hydrostatic mass analysis is also performed by combining the tSZ-constrained Pressure Profile with the deprojected electronic density Profile from XMM-$Newton$. This allows us to conclude that the estimates of $\rm{Y_{500}}$ and $\rm{M_{500}}$ obtained from the analysis with and without masking the disturbed ICM region differ by 65 and 79% respectively. (abridged)
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a multi instrument non parametric reconstruction of the electron Pressure Profile in the galaxy cluster clj1226 9 3332
arXiv: Cosmology and Nongalactic Astrophysics, 2017Co-Authors: C. Romero, J F Maciasperez, R Adam, Pascale Andre, H Aussel, A Beelen, M. Mcwilliam, A. Benoît, Peter A R Ade, A. BideaudAbstract:Context: In the past decade, sensitive, resolved Sunyaev-Zel'dovich (SZ) studies of galaxy clusters have become common. Whereas many previous SZ studies have parameterized the Pressure Profiles of galaxy clusters, non-parametric reconstructions will provide insights into the thermodynamic state of the intracluster medium (ICM). Aims: We seek to recover the non-parametric Pressure Profiles of the high redshift ($z=0.89$) galaxy cluster CLJ 1226.9+3332 as inferred from SZ data from the MUSTANG, NIKA, Bolocam, and Planck instruments, which all probe different angular scales. Methods: Our non-parametric algorithm makes use of logarithmic interpolation, which under the assumption of ellipsoidal symmetry is analytically integrable. For MUSTANG, NIKA, and Bolocam we derive a non-parametric Pressure Profile independently and find good agreement among the instruments. In particular, we find that the non-parametric Profiles are consistent with a fitted gNFW Profile. Given the ability of Planck to constrain the total signal, we include a prior on the integrated Compton Y parameter as determined by Planck. Results: For a given instrument, constraints on the Pressure Profile diminish rapidly beyond the field of view. The overlap in spatial scales probed by these four datasets is therefore critical in checking for consistency between instruments. By using multiple instruments, our analysis of CLJ 1226.9+3332 covers a large radial range, from the central regions to the cluster outskirts: $0.05 R_{500} < r < 1.1 R_{500}$. This is a wider range of spatial scales than is typical recovered by SZ instruments. Similar analyses will be possible with the new generation of SZ instruments such as NIKA2 and MUSTANG2.
L Perotto - One of the best experts on this subject based on the ideXlab platform.
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cosmological implications of a modified galaxy cluster Pressure Profile using the planck tsz power spectrum
Epj Web of Conferences, 2020Co-Authors: F Ruppin, F Mayet, J F Maciasperez, L PerottoAbstract:The mean Pressure Profile of the cluster population is a key element in cosmological analyses based on surveys of galaxy clusters observed through the Sunyaev-Zel’dovich (SZ) effect. A variation of both the shape and the amplitude of this Profile could explain part of the discrepancy currently observed between the cosmological constraints obtained from the analyses of the CMB primary anisotropies and those from cluster abundance in SZ surveys for a fixed mass bias parameter. We study the cosmological implications of a modification of the mean Pressure Profile through the analysis of the SZ power spectrum measured by Planck . We define two mean Pressure Profiles on either side of the one obtained from the observation of nearby clusters by Planck . The parameters of these Profiles are chosen to ensure their compatibility with the distributions of Pressure and gas mass fraction Profiles observed at low redshift. We find significant differences between the cosmological parameters obtained by using these two Profiles to fit the Planck SZ power spectrum and those found in previous analyses. We conclude that a ∼15% decrease of the amplitude of the mean normalized Pressure Profile is sufficient to alleviate the discrepancy observed between the constraints of σ8 and Ωm from the CMB and cluster analyses.
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cosmological implications of a modified galaxy cluster Pressure Profile using the planck tsz power spectrum
arXiv: Cosmology and Nongalactic Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, L PerottoAbstract:The mean Pressure Profile of the cluster population is a key element in cosmological analyses based on surveys of galaxy clusters observed through the Sunyaev-Zel'dovich (SZ) effect. A variation of both the shape and the amplitude of this Profile could explain part of the discrepancy currently observed between the cosmological constraints obtained from the analyses of the CMB primary anisotropies and those from cluster abundance in SZ surveys for a fixed mass bias parameter. We study the cosmological implications of a modification of the mean Pressure Profile through the analysis of the SZ power spectrum measured by $Planck$. We define two mean Pressure Profiles on either side of the one obtained from the observation of nearby clusters by $Planck$. The parameters of these Profiles are chosen to ensure their compatibility with the distributions of Pressure and gas mass fraction Profiles observed at low redshift. We find significant differences between the cosmological parameters obtained by using these two Profiles to fit the $Planck$ SZ power spectrum and those found in previous analyses. We conclude that a ${\sim}15\%$ decrease of the amplitude of the mean normalized Pressure Profile is sufficient to alleviate the discrepancy observed between the constraints of $\sigma_8$ and $\Omega_m$ from the CMB and cluster analyses.
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impact of icm disturbances on the mean Pressure Profile of galaxy clusters a prospective study of the nika2 sz large program with music synthetic clusters
Astronomy and Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, R Adam, Federico Sembolini, M De Petris, Giammarco Cialone, L PerottoAbstract:Context. The mean Pressure Profile of the galaxy cluster population plays an essential role in cosmological analyses. An accurate characterization of the shape, intrinsic scatter, and redshift evolution of this Profile is necessary to estimate some of the biases and systematic effects that currently prevent cosmological analyses based on thermal Sunyaev-Zel’dovich (tSZ) surveys from obtaining precise and unbiased cosmological constraints. This is one of the main goals of the ongoing NIKA2 SZ large program, which aims at mapping the tSZ signal of a representative cluster sample selected from the Planck and ACT catalogs and spans a redshift range 0.5 < z < 0.9.Aims. To estimate the impact of intracluster medium (ICM) disturbances that can be detected by NIKA2 on the mean Pressure Profile of galaxy clusters, we realized a study based on a synthetic cluster sample that is similar to that of the NIKA2 SZ large program.Methods. To reach this goal we employed the hydrodynamical N-body simulation Marenostrum MUltidark SImulations of galaxy Clusters (MUSIC). We simulated realistic NIKA2 and Planck tSZ observations, which were jointly analyzed to estimate the ICM Pressure Profile of each cluster. A comparison of the deprojected Profiles with the true radial Profiles directly extracted from the MUSIC simulation allowed us to validate the NIKA2 tSZ pipeline and to study the impact of ICM disturbances on the characterization of the ICM Pressure distribution even at high redshift. After normalizing each Profile by the integrated quantities estimated under the hydrostatic equilibrium hypothesis, we evaluated the mean Pressure Profile of the twin sample and show that it is compatible with that extracted directly from the MUSIC simulation in the scale range that can be recovered by NIKA2. We studied the impact of cluster dynamical state on both its shape and associated scatter.Results. We observe that at R500 the scatter of the distribution of normalized Pressure Profiles associated with the selected morphologically disturbed clusters is 65% larger than that associated with relaxed clusters. Furthermore, we show that using a basic modeling of the thermal Pressure distribution in the deprojection procedure induces a significant increase of the scatter associated with the mean normalized Pressure Profile compared to the true distribution extracted directly from the simulation.Conclusions. We conclude that the NIKA2 SZ large program will facilitate characterization of the potential redshift evolution of the mean Pressure Profile properties due to the performance of the NIKA2 camera, thereby allowing for a precise measurement of cluster morphology and ICM thermodynamic properties up to R500 at high redshift.Key words: instrumentation: high angular resolution / galaxies: clusters: intracluster medium
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impact of icm disturbances on the mean Pressure Profile of galaxy clusters a prospective study of the nika2 sz large program with music synthetic clusters
arXiv: Cosmology and Nongalactic Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, R Adam, Federico Sembolini, M De Petris, Giammarco Cialone, L PerottoAbstract:$Context$. The mean Pressure Profile of the galaxy cluster population plays an essential role in cosmological analyses. An accurate characterization of the shape, intrinsic scatter, and redshift evolution of this Profile is necessary to estimate some of the biases and systematic effects that currently prevent cosmological analyses based on thermal Sunyaev-Zel'dovich (tSZ) surveys from obtaining precise and unbiased cosmological constraints. This is one of the main goals of the ongoing NIKA2 SZ large program, which aims at mapping the tSZ signal of a representative cluster sample selected from the $Planck$ and ACT catalogs and spans a redshift range $0.5 < z < 0.9$. $Aims$. To estimate the impact of intracluster medium (ICM) disturbances that can be detected by NIKA2 on the mean Pressure Profile of galaxy clusters, we realized a study based on a synthetic cluster sample that is similar to that of the NIKA2 SZ large program. $Methods$. To reach this goal we employed the hydrodynamical simulation $Marenostrum~MUltidark~SImulations~of~galaxy~Clusters$ (MUSIC). We simulated realistic NIKA2 and $Planck$ tSZ observations, which were jointly analyzed to estimate the ICM Pressure Profile of each cluster. A comparison of the deprojected Profiles with the true radial Profiles directly extracted from the MUSIC simulation allowed us to validate the NIKA2 tSZ pipeline and to study the impact of ICM disturbances on the characterization of the ICM Pressure distribution even at high redshift. After normalizing each Profile by the integrated quantities estimated under the hydrostatic equilibrium hypothesis, we evaluated the mean Pressure Profile of the twin sample and show that it is compatible with that extracted directly from the MUSIC simulation in the scale range that can be recovered by NIKA2. We studied the impact of cluster dynamical state on both its shape and associated scatter. (abridged)
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Impact of the mean Pressure Profile of galaxy clusters on the cosmological constraints from the $Planck$ tSZ power spectrum
Mon.Not.Roy.Astron.Soc., 2019Co-Authors: F Ruppin, F Mayet, J.f. Macías-pérez, L PerottoAbstract:Cosmological analyses based on surveys of galaxy clusters observed through the Sunyaev–Zel’dovich (SZ) effect strongly rely on the mean Pressure Profile of the cluster population. A tension is currently observed between the cosmological constraints obtained from the analyses of the CMB primary anisotropies and those from cluster abundance in SZ surveys. This discrepancy may be explained by a wrong estimate of the hydrostatic bias parameter that links the hydrostatic mass to the true mass of galaxy clusters. However, a variation of both the amplitude and the shape of the mean Pressure Profile could also explain part of this tension. We analyse the effects of a modification of this Profile on the constraints of the σ_8 and Ω_m parameters through the analysis of the SZ power spectrum measured by the Planck collaboration. We choose two mean Pressure Profiles that are respectively lower and higher than the one obtained from the observation of nearby clusters by Planck. The selection of the parameters of these two Profiles is based on the current estimates of the Pressure and gas mass fraction Profile distributions at low redshift. The cosmological parameters found for these two Profiles are significantly different from the ones obtained with the Planck Pressure Profile. We conclude that an |${\sim }15{{\ \rm per\ cent}}$| decrease of the amplitude of the mean normalized Pressure Profile would alleviate the tension observed between the constraints of σ_8 and Ω_m from the CMB and cluster analyses without requiring extreme values of the mass bias parameter.
J F Maciasperez - One of the best experts on this subject based on the ideXlab platform.
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cosmological implications of a modified galaxy cluster Pressure Profile using the planck tsz power spectrum
Epj Web of Conferences, 2020Co-Authors: F Ruppin, F Mayet, J F Maciasperez, L PerottoAbstract:The mean Pressure Profile of the cluster population is a key element in cosmological analyses based on surveys of galaxy clusters observed through the Sunyaev-Zel’dovich (SZ) effect. A variation of both the shape and the amplitude of this Profile could explain part of the discrepancy currently observed between the cosmological constraints obtained from the analyses of the CMB primary anisotropies and those from cluster abundance in SZ surveys for a fixed mass bias parameter. We study the cosmological implications of a modification of the mean Pressure Profile through the analysis of the SZ power spectrum measured by Planck . We define two mean Pressure Profiles on either side of the one obtained from the observation of nearby clusters by Planck . The parameters of these Profiles are chosen to ensure their compatibility with the distributions of Pressure and gas mass fraction Profiles observed at low redshift. We find significant differences between the cosmological parameters obtained by using these two Profiles to fit the Planck SZ power spectrum and those found in previous analyses. We conclude that a ∼15% decrease of the amplitude of the mean normalized Pressure Profile is sufficient to alleviate the discrepancy observed between the constraints of σ8 and Ωm from the CMB and cluster analyses.
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cosmological implications of a modified galaxy cluster Pressure Profile using the planck tsz power spectrum
arXiv: Cosmology and Nongalactic Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, L PerottoAbstract:The mean Pressure Profile of the cluster population is a key element in cosmological analyses based on surveys of galaxy clusters observed through the Sunyaev-Zel'dovich (SZ) effect. A variation of both the shape and the amplitude of this Profile could explain part of the discrepancy currently observed between the cosmological constraints obtained from the analyses of the CMB primary anisotropies and those from cluster abundance in SZ surveys for a fixed mass bias parameter. We study the cosmological implications of a modification of the mean Pressure Profile through the analysis of the SZ power spectrum measured by $Planck$. We define two mean Pressure Profiles on either side of the one obtained from the observation of nearby clusters by $Planck$. The parameters of these Profiles are chosen to ensure their compatibility with the distributions of Pressure and gas mass fraction Profiles observed at low redshift. We find significant differences between the cosmological parameters obtained by using these two Profiles to fit the $Planck$ SZ power spectrum and those found in previous analyses. We conclude that a ${\sim}15\%$ decrease of the amplitude of the mean normalized Pressure Profile is sufficient to alleviate the discrepancy observed between the constraints of $\sigma_8$ and $\Omega_m$ from the CMB and cluster analyses.
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impact of icm disturbances on the mean Pressure Profile of galaxy clusters a prospective study of the nika2 sz large program with music synthetic clusters
Astronomy and Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, R Adam, Federico Sembolini, M De Petris, Giammarco Cialone, L PerottoAbstract:Context. The mean Pressure Profile of the galaxy cluster population plays an essential role in cosmological analyses. An accurate characterization of the shape, intrinsic scatter, and redshift evolution of this Profile is necessary to estimate some of the biases and systematic effects that currently prevent cosmological analyses based on thermal Sunyaev-Zel’dovich (tSZ) surveys from obtaining precise and unbiased cosmological constraints. This is one of the main goals of the ongoing NIKA2 SZ large program, which aims at mapping the tSZ signal of a representative cluster sample selected from the Planck and ACT catalogs and spans a redshift range 0.5 < z < 0.9.Aims. To estimate the impact of intracluster medium (ICM) disturbances that can be detected by NIKA2 on the mean Pressure Profile of galaxy clusters, we realized a study based on a synthetic cluster sample that is similar to that of the NIKA2 SZ large program.Methods. To reach this goal we employed the hydrodynamical N-body simulation Marenostrum MUltidark SImulations of galaxy Clusters (MUSIC). We simulated realistic NIKA2 and Planck tSZ observations, which were jointly analyzed to estimate the ICM Pressure Profile of each cluster. A comparison of the deprojected Profiles with the true radial Profiles directly extracted from the MUSIC simulation allowed us to validate the NIKA2 tSZ pipeline and to study the impact of ICM disturbances on the characterization of the ICM Pressure distribution even at high redshift. After normalizing each Profile by the integrated quantities estimated under the hydrostatic equilibrium hypothesis, we evaluated the mean Pressure Profile of the twin sample and show that it is compatible with that extracted directly from the MUSIC simulation in the scale range that can be recovered by NIKA2. We studied the impact of cluster dynamical state on both its shape and associated scatter.Results. We observe that at R500 the scatter of the distribution of normalized Pressure Profiles associated with the selected morphologically disturbed clusters is 65% larger than that associated with relaxed clusters. Furthermore, we show that using a basic modeling of the thermal Pressure distribution in the deprojection procedure induces a significant increase of the scatter associated with the mean normalized Pressure Profile compared to the true distribution extracted directly from the simulation.Conclusions. We conclude that the NIKA2 SZ large program will facilitate characterization of the potential redshift evolution of the mean Pressure Profile properties due to the performance of the NIKA2 camera, thereby allowing for a precise measurement of cluster morphology and ICM thermodynamic properties up to R500 at high redshift.Key words: instrumentation: high angular resolution / galaxies: clusters: intracluster medium
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impact of icm disturbances on the mean Pressure Profile of galaxy clusters a prospective study of the nika2 sz large program with music synthetic clusters
arXiv: Cosmology and Nongalactic Astrophysics, 2019Co-Authors: F Ruppin, F Mayet, J F Maciasperez, R Adam, Federico Sembolini, M De Petris, Giammarco Cialone, L PerottoAbstract:$Context$. The mean Pressure Profile of the galaxy cluster population plays an essential role in cosmological analyses. An accurate characterization of the shape, intrinsic scatter, and redshift evolution of this Profile is necessary to estimate some of the biases and systematic effects that currently prevent cosmological analyses based on thermal Sunyaev-Zel'dovich (tSZ) surveys from obtaining precise and unbiased cosmological constraints. This is one of the main goals of the ongoing NIKA2 SZ large program, which aims at mapping the tSZ signal of a representative cluster sample selected from the $Planck$ and ACT catalogs and spans a redshift range $0.5 < z < 0.9$. $Aims$. To estimate the impact of intracluster medium (ICM) disturbances that can be detected by NIKA2 on the mean Pressure Profile of galaxy clusters, we realized a study based on a synthetic cluster sample that is similar to that of the NIKA2 SZ large program. $Methods$. To reach this goal we employed the hydrodynamical simulation $Marenostrum~MUltidark~SImulations~of~galaxy~Clusters$ (MUSIC). We simulated realistic NIKA2 and $Planck$ tSZ observations, which were jointly analyzed to estimate the ICM Pressure Profile of each cluster. A comparison of the deprojected Profiles with the true radial Profiles directly extracted from the MUSIC simulation allowed us to validate the NIKA2 tSZ pipeline and to study the impact of ICM disturbances on the characterization of the ICM Pressure distribution even at high redshift. After normalizing each Profile by the integrated quantities estimated under the hydrostatic equilibrium hypothesis, we evaluated the mean Pressure Profile of the twin sample and show that it is compatible with that extracted directly from the MUSIC simulation in the scale range that can be recovered by NIKA2. We studied the impact of cluster dynamical state on both its shape and associated scatter. (abridged)
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a multi instrument non parametric reconstruction of the electron Pressure Profile in the galaxy cluster clj1226 9 3332
Astronomy and Astrophysics, 2018Co-Authors: C. Romero, J F Maciasperez, R Adam, H Aussel, M. Mcwilliam, P. André, Peter A R Ade, A BeelenAbstract:Context . In the past decade, sensitive, resolved Sunyaev-Zel’dovich (SZ) studies of galaxy clusters have become common. Whereas many previous SZ studies have parameterized the Pressure Profiles of galaxy clusters, non-parametric reconstructions will provide insights into the thermodynamic state of the intracluster medium.Aim . We seek to recover the non-parametric Pressure Profiles of the high redshift (z = 0.89) galaxy cluster CLJ 1226.9+3332 as inferred from SZ data from the MUSTANG, NIKA, Bolocam, and Planck instruments, which all probe different angular scales.Methods . Our non-parametric algorithm makes use of logarithmic interpolation, which under the assumption of ellipsoidal symmetry is analytically integrable. For MUSTANG, NIKA, and Bolocam we derive a non-parametric Pressure Profile independently and find good agreement among the instruments. In particular, we find that the non-parametric Profiles are consistent with a fitted generalized Navaro-Frenk-White (gNFW) Profile. Given the ability of Planck to constrain the total signal, we include a prior on the integrated Compton Y parameter as determined by Planck .Results . For a given instrument, constraints on the Pressure Profile diminish rapidly beyond the field of view. The overlap in spatial scales probed by these four datasets is therefore critical in checking for consistency between instruments. By using multiple instruments, our analysis of CLJ 1226.9+3332 covers a large radial range, from the central regions to the cluster outskirts: 0.05 R 500 500 . This is a wider range of spatial scales than is typically recovered by SZ instruments. Similar analyses will be possible with the new generation of SZ instruments such as NIKA2 and MUSTANG2.
