2025/03/31 by Tingwei Shen, Shen, Tingwei, Xuejian Shen +7 · 6 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gravitational wave #Population #Primordial black hole #Quasar #Redshift #Relativity and Gravitational Theory #Solar mass #Supermassive black hole #Weakly interacting massive particles #astro-ph.CO #astro-ph.GA #hep-ph
paper · pdf · doi:10.48550/arxiv.2504.00075
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2025/03/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Observations of supermassive black holes (SMBHs) at high redshifts challenge standard seeding scenarios. We examine a dissipative self-interacting dark matter (dSIDM) model in which gravothermal collapse leads to the formation of massive BH seeds ab initio. We utilize a semi-analytical framework to predict properties of the dSIDM-seeded SMBH population. Billion solar mass quasars are reproduced along with low-mass faint active galactic nuclei (known as little red dots) with SMBH-to-galaxy stellar mass ratios consistent with recent James Webb Space Telescope observations. To match the abundance of the observed bright quasars, a percent-level duty-cycle is suggested, implying a large population of dormant SMBHs. The gravitational wave (GW) signals from mergers of these massive SMBHs can be detected by LISA while remaining within the NANOGrav constraints on the GW background. These results provide testable signatures of DM-driven SMBH formation, offering a pathway to probe hidden-sector physics through SMBH and GW observables.