On the growth of supermassive black holes formed from the gravitational collapse of fermionic dark matter cores
Argüelles C.R. Boshkayev K. Krut A. Nurbakhyt G. Rueda J.A. Ruffini R. Uribe-Suárez J.D. Yunis R.
1 August 2023Oxford University Press
Monthly Notices of the Royal Astronomical Society
2023#523Issue 22209 - 2218 pp.
Observations support the idea that supermassive black holes (SMBHs) power the emission at the centre 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 centre of DM haloes 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 disc accretion model. We show that these SMBH seeds grow to ∼109–1010 M in the first Gyr of the lifetime of the Universe without invoking unrealistic (or fine-tuned) accretion rates.
dark matter , galaxies: formation , galaxies: high-redshift , galaxies: nuclei , galaxies: structure , quasars: supermassive black holes
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Instituto de Astrofísica de La Plata, UNLP-CONICET, Paseo del Bosque s/n, La Plata, B1900FWA, Argentina
ICRANet, Piazza della Repubblica 10, Pescara, I-65122, Italy
ICRA, Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 5, Roma, I-00185, Italy
NNLOT, Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
International University of Information Technology, Manas St. 34/1, Almaty, 050040, Kazakhstan
ICRANet-Ferrara, Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Ferrara, Via Saragat 1, Ferrara, I-44122, Italy
Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Ferrara, Via Saragat 1, Ferrara, I-44122, Italy
INAF, Istituto di Astrofisica e Planetologia Spaziali, Via Fosso del Cavaliere 100, Rome, I-00133, Italy
INAF, Viale del Parco Mellini 84, Rome, I-00136, Italy
Facultad de Ciencias Básicas, Universidad Santiago de Cali, Campus Pampalinda, Calle 5 No. 6200, Santiago de Cali, 760035, Colombia
Instituto de Astrofísica de La Plata
ICRANet
ICRA
NNLOT
International University of Information Technology
ICRANet-Ferrara
Dipartimento di Fisica e Scienze della Terra
INAF
INAF
Facultad de Ciencias Básicas
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