On the growth of supermassive black holes formed from the gravitational collapse of fermionic dark matter cores

Abstract

Observations support the idea that supermassive black holes (SMBHs) power the emission at the center of active galaxies. However, contrary to stellar-mass BHs, there is a poor understanding of their origin and physical formation channel. In this article, we propose a new process of SMBH formation in the early Universe that is not associated with baryonic matter (massive stars) or primordial cosmology. In this novel approach, SMBH seeds originate from the gravitational collapse of fermionic dense dark matter (DM) cores that arise at the center of DM halos as they form. We show that such a DM formation channel can occur before star formation, leading to heavier BH seeds than standard baryonic channels. The SMBH seeds subsequently grow by accretion. We compute the evolution of the mass and angular momentum of the BH using a geodesic general relativistic disk accretion model. We show that these SMBH seeds grow to $\sim 10^9$-$10^{10}{M}_{\odot }$ in the first Gyr of the lifetime of the Universe without invoking unrealistic (or fine-tuned) accretion rates.

11 pages, 9 figures, 2 appendices. Accepted for publication in MNRAS

References in corpus (16)

• Formation of Supermassive Black Holes by Direct Collapse in Pregalactic Halos
• Primordial Black Holes as Dark Matter: Recent Developments
• Neutrino-Cooled Accretion Disks around Spinning Black Hole
• The origins of massive black holes
• Quasistars: Accreting black holes inside massive envelopes
• Turbulent Cold Flows Gave Birth to the First Quasars
• Hinting a dark matter nature of Sgr A* via the S-stars
• Accretion disk luminosity for black holes surrounded by dark matter
• The geodesic motion of S2 and G2 as a test of the fermionic dark matter nature of our galactic core
• On the formation and stability of fermionic dark matter halos in a cosmological framework
• Gravitomagnetic interaction of a Kerr black hole with a magnetic field as the source of the jetted GeV radiation of gamma-ray bursts
• SMBH Seeds from Dissipative Dark Matter
• Predictive model of fermionic dark matter halos with a quantum core and an isothermal atmosphere
• Galaxy rotation curves and universal scaling relations: comparison between phenomenological and fermionic dark matter profiles
• Black holes at cosmic dawn in the redshifted 21cm signal of HI
• Reshaping our understanding on structure formation with the quantum nature of the dark matter

Cited by in corpus (10)

• Low Mass Naked Singularities from Dark Core Collapse
• Imaging fermionic dark matter cores at the center of galaxies
• Accretion discs onto supermassive compact objects: a portal to dark matter physics in active galaxies
• Probing electromagnetic-gravitational wave emission coincidence in type I binary-driven hypernova family of long GRBs at very-high redshift
• Dark Matter reconstruction from stellar orbits in the Galactic Centre
• Thermodynamics of self-gravitating fermions as a robust theory for dark matter halos: Stability analysis applied to the Milky Way
• Black Hole Cold Brew: Fermi Degeneracy Pressure
• The dynamics of S-stars and G-sources orbiting a supermassive compact object made of fermionic dark matter
• The Sagittarius stellar stream embedded in a fermionic dark matter halo
• Fermionic Dark Matter spikes: origin and growth of Black Hole seeds