Solar-Mass Primordial Black Holes Explain NANOGrav Hint of Gravitational Waves
Cosmology and Nongalactic Astrophysics
2021-02-18 v4 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
The NANOGrav collaboration for the pulsar timing array (PTA) observation recently announced evidence of an isotropic stochastic process, which may be the first detection of the stochastic gravitational-wave (GW) background. We discuss the possibility that the signal is caused by the second-order GWs associated with the formation of solar-mass primordial black holes (PBHs). This possibility can be tested by future interferometer-type GW observations targeting the stochastic GWs from merger events of solar-mass PBHs as well as by updates of PTA observations.
Keywords
Cite
@article{arxiv.2009.11853,
title = {Solar-Mass Primordial Black Holes Explain NANOGrav Hint of Gravitational Waves},
author = {Kazunori Kohri and Takahiro Terada},
journal= {arXiv preprint arXiv:2009.11853},
year = {2021}
}
Comments
25 pages, 5 figures; reference added