The Experts below are selected from a list of 32058 Experts worldwide ranked by ideXlab platform

Brian C Lacki - One of the best experts on this subject based on the ideXlab platform.

  • cherenkov Telescopes as Optical Telescopes for bright sources today s specialized 30 m Telescopes
    Monthly Notices of the Royal Astronomical Society, 2011
    Co-Authors: Brian C Lacki
    Abstract:

    Imaging Atmospheric Cherenkov Telescopes (IACTs) use large-aperture (3–30 m) Optical Telescopes with arcminute angular resolution to detect TeV gamma-rays in the atmosphere. I show that IACTs are well suited for Optical observations of bright sources (V≲ 8–10), because these sources are brighter than the sky background. Their advantages are especially great on rapid time-scales. Thus, IACTs might study many phenomena Optically, including transiting exoplanets and the brightest gamma-ray bursts. In principle, an IACT could achieve millimagnitude photometry of these objects with second-long exposures. I also consider the potential for Optical spectroscopy with IACTs, finding that their poor angular resolution limits their usefulness for high spectral resolutions, unless complex instruments are developed. The high photon collection rate of IACTs is potentially useful for precise polarimetry. Finally, I briefly discuss the broader possibilities of extremely large, low-resolution Telescopes, including a 10 arcsec resolution telescope and space-borne Telescopes.

  • cherenkov Telescopes as Optical Telescopes for bright sources today s specialised thirty metre Telescopes
    arXiv: Instrumentation and Methods for Astrophysics, 2011
    Co-Authors: Brian C Lacki
    Abstract:

    Imaging Atmospheric Cherenkov Telescopes (IACTs) use large-aperture (~ 10 - 30 m) Optical Telescopes with arcminute angular resolution to detect TeV gamma-rays in the atmosphere. I show that IACTs are well-suited for Optical observations of bright sources (V <= 8 - 10), because these sources are brighter than the sky background. Their advantages are especially great on rapid time-scales. Thus, IACTs are ideal for studying many phenomena Optically, including transiting exoplanets and the brightest gamma-ray bursts. In principle, an IACT could achieve millimagnitude photometry of these objects with second-long exposures. I also consider the potential for Optical spectroscopy with IACTs, finding that their poor angular resolution limits their usefulness for high spectral resolutions, unless complex instruments are developed. The high photon collection rate of IACTs is potentially useful for precise polarimetry. Finally, I briefly discuss the broader possibilities of extremely large, low resolution Telescopes, including a 10" resolution telescope and spaceborne Telescopes.

  • cherenkov Telescopes as Optical Telescopes for bright sources today s specialised thirty metre Telescopes
    Monthly Notices of the Royal Astronomical Society, 2011
    Co-Authors: Brian C Lacki
    Abstract:

    Imaging Atmospheric Cherenkov Telescopes (IACTs) use large-aperture (� 10 30 m) Optical Telescopes with arcminute angular resolution to detect TeV gamma-rays in the atmosphere. I show that IACTs are well-suited for Optical observations of bright sources (V < 8 10), because these sources are brighter than the sky background. Their advantages are especially great on rapid time-scales. Thus, IACTs are ideal for studying many phenomena Optically, including transiting exoplanets and the brightest gamma-ray bursts. In principle, an IACT could achieve millimagnitude photometry of these objects with second-long exposures. I also consider the potential for Optical spectroscopy with IACTs, finding that their poor angular resolution limits their usefulness for high spectral resolutions, unless complex instruments are developed. The high photon collection rate of IACTs is potentially useful for precise polarimetry. Finally, I briefly discuss the broader possibilities of extremely large, low resolution Telescopes, including a 10 arcsec resolution telescope and spaceborne Telescopes.

Misao Sasaki - One of the best experts on this subject based on the ideXlab platform.

  • exploring primordial black holes from the multiverse with Optical Telescopes
    Physical Review Letters, 2020
    Co-Authors: Alexander Kusenko, Misao Sasaki, Sunao Sugiyama, Masahiro Takada, Volodymyr Takhistov, Edoardo Vitagliano
    Abstract:

    Primordial black holes (PBHs) are a viable candidate for dark matter if the PBH masses are in the currently unconstrained ``sublunar'' mass range. We revisit the possibility that PBHs were produced by nucleation of false vacuum bubbles during inflation. We show that this scenario can produce a population of PBHs that simultaneously accounts for all dark matter, explains the candidate event in the Subaru Hyper Suprime-Cam (HSC) data, and contains both heavy black holes as observed by LIGO and very heavy seeds of supermassive black holes. We demonstrate with numerical studies that future observations of HSC, as well as other Optical surveys, such as LSST, will be able to provide a definitive test for this generic PBH formation mechanism if it is the dominant source of dark matter.

  • testing stochastic gravitational wave signals from primordial black holes with Optical Telescopes
    arXiv: Cosmology and Nongalactic Astrophysics, 2020
    Co-Authors: Sunao Sugiyama, Alexander Kusenko, Misao Sasaki, Volodymyr Takhistov, Edoardo Vitagliano, Masahiro Takada
    Abstract:

    Primordial black holes (PBHs) can constitute the predominant fraction of dark matter (DM) if PBHs reside in the currently unconstrained "sublunar'' mass range. PBHs originating from scalar perturbations generated during inflation can naturally appear with a broad spectrum in a class of models. The resulting stochastic gravitational wave (GW) background generated from such PBH production can account for the recently reported North American Nanohertz Observatory for Gravitational Waves (NANOGrav) pulsar timing array data signal, and will be testable in future GW observations by interferometer-type experiments such as Laser Interferometer Space Antenna (LISA). We show that the broad mass function of such PBH DM is already being probed by Subaru Hyper Suprime-Cam (HSC) microlensing data and is consistent with a detected candidate event. Upcoming observations of HSC will be able to provide an independent definitive test of the stochastic GW signals originating from such PBH DM production scenarios.

Alexander Kusenko - One of the best experts on this subject based on the ideXlab platform.

  • exploring primordial black holes from the multiverse with Optical Telescopes
    Physical Review Letters, 2020
    Co-Authors: Alexander Kusenko, Misao Sasaki, Sunao Sugiyama, Masahiro Takada, Volodymyr Takhistov, Edoardo Vitagliano
    Abstract:

    Primordial black holes (PBHs) are a viable candidate for dark matter if the PBH masses are in the currently unconstrained ``sublunar'' mass range. We revisit the possibility that PBHs were produced by nucleation of false vacuum bubbles during inflation. We show that this scenario can produce a population of PBHs that simultaneously accounts for all dark matter, explains the candidate event in the Subaru Hyper Suprime-Cam (HSC) data, and contains both heavy black holes as observed by LIGO and very heavy seeds of supermassive black holes. We demonstrate with numerical studies that future observations of HSC, as well as other Optical surveys, such as LSST, will be able to provide a definitive test for this generic PBH formation mechanism if it is the dominant source of dark matter.

  • testing stochastic gravitational wave signals from primordial black holes with Optical Telescopes
    arXiv: Cosmology and Nongalactic Astrophysics, 2020
    Co-Authors: Sunao Sugiyama, Alexander Kusenko, Misao Sasaki, Volodymyr Takhistov, Edoardo Vitagliano, Masahiro Takada
    Abstract:

    Primordial black holes (PBHs) can constitute the predominant fraction of dark matter (DM) if PBHs reside in the currently unconstrained "sublunar'' mass range. PBHs originating from scalar perturbations generated during inflation can naturally appear with a broad spectrum in a class of models. The resulting stochastic gravitational wave (GW) background generated from such PBH production can account for the recently reported North American Nanohertz Observatory for Gravitational Waves (NANOGrav) pulsar timing array data signal, and will be testable in future GW observations by interferometer-type experiments such as Laser Interferometer Space Antenna (LISA). We show that the broad mass function of such PBH DM is already being probed by Subaru Hyper Suprime-Cam (HSC) microlensing data and is consistent with a detected candidate event. Upcoming observations of HSC will be able to provide an independent definitive test of the stochastic GW signals originating from such PBH DM production scenarios.

Edoardo Vitagliano - One of the best experts on this subject based on the ideXlab platform.

  • exploring primordial black holes from the multiverse with Optical Telescopes
    Physical Review Letters, 2020
    Co-Authors: Alexander Kusenko, Misao Sasaki, Sunao Sugiyama, Masahiro Takada, Volodymyr Takhistov, Edoardo Vitagliano
    Abstract:

    Primordial black holes (PBHs) are a viable candidate for dark matter if the PBH masses are in the currently unconstrained ``sublunar'' mass range. We revisit the possibility that PBHs were produced by nucleation of false vacuum bubbles during inflation. We show that this scenario can produce a population of PBHs that simultaneously accounts for all dark matter, explains the candidate event in the Subaru Hyper Suprime-Cam (HSC) data, and contains both heavy black holes as observed by LIGO and very heavy seeds of supermassive black holes. We demonstrate with numerical studies that future observations of HSC, as well as other Optical surveys, such as LSST, will be able to provide a definitive test for this generic PBH formation mechanism if it is the dominant source of dark matter.

  • testing stochastic gravitational wave signals from primordial black holes with Optical Telescopes
    arXiv: Cosmology and Nongalactic Astrophysics, 2020
    Co-Authors: Sunao Sugiyama, Alexander Kusenko, Misao Sasaki, Volodymyr Takhistov, Edoardo Vitagliano, Masahiro Takada
    Abstract:

    Primordial black holes (PBHs) can constitute the predominant fraction of dark matter (DM) if PBHs reside in the currently unconstrained "sublunar'' mass range. PBHs originating from scalar perturbations generated during inflation can naturally appear with a broad spectrum in a class of models. The resulting stochastic gravitational wave (GW) background generated from such PBH production can account for the recently reported North American Nanohertz Observatory for Gravitational Waves (NANOGrav) pulsar timing array data signal, and will be testable in future GW observations by interferometer-type experiments such as Laser Interferometer Space Antenna (LISA). We show that the broad mass function of such PBH DM is already being probed by Subaru Hyper Suprime-Cam (HSC) microlensing data and is consistent with a detected candidate event. Upcoming observations of HSC will be able to provide an independent definitive test of the stochastic GW signals originating from such PBH DM production scenarios.

Sunao Sugiyama - One of the best experts on this subject based on the ideXlab platform.

  • exploring primordial black holes from the multiverse with Optical Telescopes
    Physical Review Letters, 2020
    Co-Authors: Alexander Kusenko, Misao Sasaki, Sunao Sugiyama, Masahiro Takada, Volodymyr Takhistov, Edoardo Vitagliano
    Abstract:

    Primordial black holes (PBHs) are a viable candidate for dark matter if the PBH masses are in the currently unconstrained ``sublunar'' mass range. We revisit the possibility that PBHs were produced by nucleation of false vacuum bubbles during inflation. We show that this scenario can produce a population of PBHs that simultaneously accounts for all dark matter, explains the candidate event in the Subaru Hyper Suprime-Cam (HSC) data, and contains both heavy black holes as observed by LIGO and very heavy seeds of supermassive black holes. We demonstrate with numerical studies that future observations of HSC, as well as other Optical surveys, such as LSST, will be able to provide a definitive test for this generic PBH formation mechanism if it is the dominant source of dark matter.

  • testing stochastic gravitational wave signals from primordial black holes with Optical Telescopes
    arXiv: Cosmology and Nongalactic Astrophysics, 2020
    Co-Authors: Sunao Sugiyama, Alexander Kusenko, Misao Sasaki, Volodymyr Takhistov, Edoardo Vitagliano, Masahiro Takada
    Abstract:

    Primordial black holes (PBHs) can constitute the predominant fraction of dark matter (DM) if PBHs reside in the currently unconstrained "sublunar'' mass range. PBHs originating from scalar perturbations generated during inflation can naturally appear with a broad spectrum in a class of models. The resulting stochastic gravitational wave (GW) background generated from such PBH production can account for the recently reported North American Nanohertz Observatory for Gravitational Waves (NANOGrav) pulsar timing array data signal, and will be testable in future GW observations by interferometer-type experiments such as Laser Interferometer Space Antenna (LISA). We show that the broad mass function of such PBH DM is already being probed by Subaru Hyper Suprime-Cam (HSC) microlensing data and is consistent with a detected candidate event. Upcoming observations of HSC will be able to provide an independent definitive test of the stochastic GW signals originating from such PBH DM production scenarios.