NANOGrav Results and LIGO-Virgo Primordial Black Holes in Axionlike Curvaton Models

2020/11/30 by Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida +1 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Axion #Binary black hole #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark matter #Gravitational wave #LIGO #Particle physics #Physics #Primordial black hole #Pulsars and Gravitational Waves Research #astro-ph.CO #hep-ph

paper · pdf · doi:10.1103/physrevlett.126.131301

published as Phys. Rev. Lett. 126, 131301 (2021) · 6 pages, 2 figures, v2: version published in PRL, minor revision

openalex created_date 2020/11/09 · openalex publication_date 2021/03/31 · arxiv created 2021/04/06 · arxiv updated 2021/04/07 · openalex updated_date 2026/08/06

Abstract

We discuss a possible connection between the recent NANOGrav results and the primordial black holes (PBHs) for the LIGO-Virgo events. In particular, we focus on the axionlike curvaton model, which provides a sizable amount of PBHs and gravitational waves (GWs) induced by scalar perturbations around the NANOGrav frequency range. The inevitable non-Gaussianity of this model suppresses the induced GWs associated with PBHs for the LIGO-Virgo events to be compatible with the NANOGrav results. We show that the axionlike curvaton model can account for PBHs for the LIGO-Virgo events and the NANOGrav results simultaneously.

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