Testing stochastic gravitational wave signals from primordial black holes with optical telescopes

Sunao Sugiyama; Volodymyr Takhistov; Edoardo Vitagliano; Alexander Kusenko; Misao Sasaki; Masahiro Takada

Physics Letters B (Mar 2021)

Testing stochastic gravitational wave signals from primordial black holes with optical telescopes

Sunao Sugiyama,
Volodymyr Takhistov,
Edoardo Vitagliano,
Alexander Kusenko,
Misao Sasaki,
Masahiro Takada

Affiliations

Sunao Sugiyama: Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan; Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Volodymyr Takhistov: Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan; Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, CA, 90095-1547, USA; Corresponding author.
Edoardo Vitagliano: Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, CA, 90095-1547, USA
Alexander Kusenko: Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, CA, 90095-1547, USA; Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
Misao Sasaki: Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan; Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan; Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan
Masahiro Takada: Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan

Journal volume & issue: Vol. 814
p. 136097

Abstract

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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.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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