The Experts below are selected from a list of 48 Experts worldwide ranked by ideXlab platform
M Benisty - One of the best experts on this subject based on the ideXlab platform.
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the disk substructures at high angular resolution project dsharp v interpreting alma maps of protoplanetary disks in terms of a dust model
arXiv: Solar and Stellar Astrophysics, 2018Co-Authors: Tilman Birnstiel, C P Dullemond, Zhaohuan Zhu, Sean M Andrews, Xuening Bai, David J Wilner, John M Carpenter, Jane Huang, Andrea Isella, M BenistyAbstract:The Disk Substructures at High Angular Resolution Project (DSHARP) is the largest homogeneous high-resolution ($\sim 0.035$ arcsec, or $\sim$ 5 au) disk continuum imaging survey with ALMA so far. In the coming years, many more disks will be mapped with ALMA at similar resolution. Interpreting the results in terms of the properties and quantities of the emitting Dusty Material is, however, a very non-trivial task. This is in part due to the uncertainty in the dust opacities, an uncertainty which is not likely to be resolved any time soon. It is also partly due to the fact that, as the DSHARP survey has shown, these disk often contain regions of intermediate to high optical depth, even at millimeter wavelengths and at relatively large radius in the disk. This makes the interpretation challenging, in particular if the grains are large and have a large albedo. On the other hand, the highly structured features seen in the DSHARP survey, of which strong indications were already seen in earlier observations, provide a unique opportunity to study the dust growth and dynamics. To provide continuity within the DSHARP project, its follow-up projects, and projects by other teams interested in these data, we present here the methods and opacity choices used within the DSHARP collaboration to link the measured intensity $I_\nu$ to dust surface density $\Sigma_d$.
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the disk substructures at high angular resolution project dsharp v interpreting alma maps of protoplanetary disks in terms of a dust model
The Astrophysical Journal, 2018Co-Authors: Tilman Birnstiel, C P Dullemond, Zhaohuan Zhu, Sean M Andrews, Xuening Bai, David J Wilner, John M Carpenter, Jane Huang, Andrea Isella, M BenistyAbstract:The Disk Substructures at High Angular Resolution Project (DSHARP) is the largest homogeneous high-resolution (approximate to 0.'' 035, or similar to 5 au) disk continuum imaging survey with the Atacama Large Millimeter/submillimeter Array (ALMA) so far. In the coming years, many more disks will be mapped with ALMA at similar resolution. Interpreting the results in terms of the properties and quantities of the emitting Dusty Material is, however, a very non-trivial task. This is in part due to the uncertainty in the dust opacities, an uncertainty that is not likely to be resolved any time soon. It is also partly due to the fact that, as the DSHARP survey has shown, these disk often contain regions of intermediate to high optical depth, even at millimeter wavelengths and at relatively large radius in the disk. This makes the interpretation challenging, in particular if the grains are large and have a large albedo. On the other hand, the highly structured features seen in the DSHARP survey, of which strong indications were already seen in earlier observations, provide a unique opportunity to study the dust growth and dynamics. To provide continuity within the DSHARP project, its follow-up projects, and projects by other teams interested in these data, we present here the methods and opacity choices used within the DSHARP collaboration to link the measured intensity I-nu to dust surface density Sigma(d).
R D Jeffries - One of the best experts on this subject based on the ideXlab platform.
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an anomalous extinction law in the cep ob3b young cluster evidence for dust processing during gas dispersal
The Astrophysical Journal, 2014Co-Authors: Thomas Allen, Jakub Prchlik, Thomas S Megeath, R A Gutermuth, Judith L Pipher, T Naylor, R D JeffriesAbstract:We determine the extinction law through Cep OB3b, a young cluster of 3000 stars undergoing gas dispersal. The extinction is measured toward 76 background K giants identified with MMT/Hectospec spectra. Color excess ratios were determined toward each of the giants using V and R photometry from the literature, g, r, i, and z photometry from the Sloan Digital Sky Survey and J, H, and Ks photometry from the Two Micron All Sky Survey. These color excess ratios were then used to construct the extinction law through the Dusty Material associated with Cep OB3b. The extinction law through Cep OB3b is intermediate between the RV = 3.1 and RV = 5 laws commonly used for the diffuse atomic interstellar medium and dense molecular clouds, respectively. The dependence of the extinction law on line-of-sight AV is investigated and we find the extinction law becomes shallower for regions with AV > 2.5 mag. We speculate that the intermediate dust law results from dust processing during the dispersal of the molecular cloud by the cluster
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an anomalous extinction law in the cep ob3b young cluster evidence for dust processing during gas dispersal
arXiv: Astrophysics of Galaxies, 2014Co-Authors: Thomas Allen, Jakub Prchlik, Thomas S Megeath, R A Gutermuth, Judith L Pipher, T Naylor, R D JeffriesAbstract:We determine the extinction law through Cep OB3b, a young cluster of 3000 stars undergoing gas dispersal. The extinction is measured toward 76 background K giants identified with MMT/Hectospec spectra. Color excess ratios were determined toward each of the giants using $V$ and $R$ photometry from the literature, $g$,$r$,$i$ and $z$ photometry from SDSS and $J$, $H$, and $K_{s}$ photometry from 2MASS. These color excess ratios were the used to construct the extinction law through the Dusty Material associated with Cep OB3b. The extinction law through Cep OB3b is intermediate between the $R_{V} = 3.1$ and $R_{V} = 5$ laws commonly used for the diffuse atomic ISM and dense molecular clouds, respectively. The dependence of the extinction law on line-of-sight $A_{V}$ is investigated and we find the extinction law becomes shallower for regions with $A_{V} > 2.5$ magnitudes. We speculate that the intermediate dust law results from dust processing during the dispersal of the molecular cloud by the cluster.
Jakub Prchlik - One of the best experts on this subject based on the ideXlab platform.
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an anomalous extinction law in the cep ob3b young cluster evidence for dust processing during gas dispersal
The Astrophysical Journal, 2014Co-Authors: Thomas Allen, Jakub Prchlik, Thomas S Megeath, R A Gutermuth, Judith L Pipher, T Naylor, R D JeffriesAbstract:We determine the extinction law through Cep OB3b, a young cluster of 3000 stars undergoing gas dispersal. The extinction is measured toward 76 background K giants identified with MMT/Hectospec spectra. Color excess ratios were determined toward each of the giants using V and R photometry from the literature, g, r, i, and z photometry from the Sloan Digital Sky Survey and J, H, and Ks photometry from the Two Micron All Sky Survey. These color excess ratios were then used to construct the extinction law through the Dusty Material associated with Cep OB3b. The extinction law through Cep OB3b is intermediate between the RV = 3.1 and RV = 5 laws commonly used for the diffuse atomic interstellar medium and dense molecular clouds, respectively. The dependence of the extinction law on line-of-sight AV is investigated and we find the extinction law becomes shallower for regions with AV > 2.5 mag. We speculate that the intermediate dust law results from dust processing during the dispersal of the molecular cloud by the cluster
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an anomalous extinction law in the cep ob3b young cluster evidence for dust processing during gas dispersal
arXiv: Astrophysics of Galaxies, 2014Co-Authors: Thomas Allen, Jakub Prchlik, Thomas S Megeath, R A Gutermuth, Judith L Pipher, T Naylor, R D JeffriesAbstract:We determine the extinction law through Cep OB3b, a young cluster of 3000 stars undergoing gas dispersal. The extinction is measured toward 76 background K giants identified with MMT/Hectospec spectra. Color excess ratios were determined toward each of the giants using $V$ and $R$ photometry from the literature, $g$,$r$,$i$ and $z$ photometry from SDSS and $J$, $H$, and $K_{s}$ photometry from 2MASS. These color excess ratios were the used to construct the extinction law through the Dusty Material associated with Cep OB3b. The extinction law through Cep OB3b is intermediate between the $R_{V} = 3.1$ and $R_{V} = 5$ laws commonly used for the diffuse atomic ISM and dense molecular clouds, respectively. The dependence of the extinction law on line-of-sight $A_{V}$ is investigated and we find the extinction law becomes shallower for regions with $A_{V} > 2.5$ magnitudes. We speculate that the intermediate dust law results from dust processing during the dispersal of the molecular cloud by the cluster.
Tilman Birnstiel - One of the best experts on this subject based on the ideXlab platform.
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the disk substructures at high angular resolution project dsharp v interpreting alma maps of protoplanetary disks in terms of a dust model
arXiv: Solar and Stellar Astrophysics, 2018Co-Authors: Tilman Birnstiel, C P Dullemond, Zhaohuan Zhu, Sean M Andrews, Xuening Bai, David J Wilner, John M Carpenter, Jane Huang, Andrea Isella, M BenistyAbstract:The Disk Substructures at High Angular Resolution Project (DSHARP) is the largest homogeneous high-resolution ($\sim 0.035$ arcsec, or $\sim$ 5 au) disk continuum imaging survey with ALMA so far. In the coming years, many more disks will be mapped with ALMA at similar resolution. Interpreting the results in terms of the properties and quantities of the emitting Dusty Material is, however, a very non-trivial task. This is in part due to the uncertainty in the dust opacities, an uncertainty which is not likely to be resolved any time soon. It is also partly due to the fact that, as the DSHARP survey has shown, these disk often contain regions of intermediate to high optical depth, even at millimeter wavelengths and at relatively large radius in the disk. This makes the interpretation challenging, in particular if the grains are large and have a large albedo. On the other hand, the highly structured features seen in the DSHARP survey, of which strong indications were already seen in earlier observations, provide a unique opportunity to study the dust growth and dynamics. To provide continuity within the DSHARP project, its follow-up projects, and projects by other teams interested in these data, we present here the methods and opacity choices used within the DSHARP collaboration to link the measured intensity $I_\nu$ to dust surface density $\Sigma_d$.
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the disk substructures at high angular resolution project dsharp v interpreting alma maps of protoplanetary disks in terms of a dust model
The Astrophysical Journal, 2018Co-Authors: Tilman Birnstiel, C P Dullemond, Zhaohuan Zhu, Sean M Andrews, Xuening Bai, David J Wilner, John M Carpenter, Jane Huang, Andrea Isella, M BenistyAbstract:The Disk Substructures at High Angular Resolution Project (DSHARP) is the largest homogeneous high-resolution (approximate to 0.'' 035, or similar to 5 au) disk continuum imaging survey with the Atacama Large Millimeter/submillimeter Array (ALMA) so far. In the coming years, many more disks will be mapped with ALMA at similar resolution. Interpreting the results in terms of the properties and quantities of the emitting Dusty Material is, however, a very non-trivial task. This is in part due to the uncertainty in the dust opacities, an uncertainty that is not likely to be resolved any time soon. It is also partly due to the fact that, as the DSHARP survey has shown, these disk often contain regions of intermediate to high optical depth, even at millimeter wavelengths and at relatively large radius in the disk. This makes the interpretation challenging, in particular if the grains are large and have a large albedo. On the other hand, the highly structured features seen in the DSHARP survey, of which strong indications were already seen in earlier observations, provide a unique opportunity to study the dust growth and dynamics. To provide continuity within the DSHARP project, its follow-up projects, and projects by other teams interested in these data, we present here the methods and opacity choices used within the DSHARP collaboration to link the measured intensity I-nu to dust surface density Sigma(d).
Thomas Allen - One of the best experts on this subject based on the ideXlab platform.
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an anomalous extinction law in the cep ob3b young cluster evidence for dust processing during gas dispersal
The Astrophysical Journal, 2014Co-Authors: Thomas Allen, Jakub Prchlik, Thomas S Megeath, R A Gutermuth, Judith L Pipher, T Naylor, R D JeffriesAbstract:We determine the extinction law through Cep OB3b, a young cluster of 3000 stars undergoing gas dispersal. The extinction is measured toward 76 background K giants identified with MMT/Hectospec spectra. Color excess ratios were determined toward each of the giants using V and R photometry from the literature, g, r, i, and z photometry from the Sloan Digital Sky Survey and J, H, and Ks photometry from the Two Micron All Sky Survey. These color excess ratios were then used to construct the extinction law through the Dusty Material associated with Cep OB3b. The extinction law through Cep OB3b is intermediate between the RV = 3.1 and RV = 5 laws commonly used for the diffuse atomic interstellar medium and dense molecular clouds, respectively. The dependence of the extinction law on line-of-sight AV is investigated and we find the extinction law becomes shallower for regions with AV > 2.5 mag. We speculate that the intermediate dust law results from dust processing during the dispersal of the molecular cloud by the cluster
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an anomalous extinction law in the cep ob3b young cluster evidence for dust processing during gas dispersal
arXiv: Astrophysics of Galaxies, 2014Co-Authors: Thomas Allen, Jakub Prchlik, Thomas S Megeath, R A Gutermuth, Judith L Pipher, T Naylor, R D JeffriesAbstract:We determine the extinction law through Cep OB3b, a young cluster of 3000 stars undergoing gas dispersal. The extinction is measured toward 76 background K giants identified with MMT/Hectospec spectra. Color excess ratios were determined toward each of the giants using $V$ and $R$ photometry from the literature, $g$,$r$,$i$ and $z$ photometry from SDSS and $J$, $H$, and $K_{s}$ photometry from 2MASS. These color excess ratios were the used to construct the extinction law through the Dusty Material associated with Cep OB3b. The extinction law through Cep OB3b is intermediate between the $R_{V} = 3.1$ and $R_{V} = 5$ laws commonly used for the diffuse atomic ISM and dense molecular clouds, respectively. The dependence of the extinction law on line-of-sight $A_{V}$ is investigated and we find the extinction law becomes shallower for regions with $A_{V} > 2.5$ magnitudes. We speculate that the intermediate dust law results from dust processing during the dispersal of the molecular cloud by the cluster.
