Dark Matter Accretion into Supermassive Black Holes

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dc.creatorPeirani, Sébastien
dc.creatorPacheco, José Antonio De Freitas
dc.date2008-02-14
dc.date.accessioned2026-07-07T12:14:12Z
dc.date.available2026-07-07T12:14:12Z
dc.descriptionThe relativistic accretion rate of dark matter by a black hole is revisited. Under the assumption that the phase space density indicator, $Q=ρ_{\infty}/σ^3_{\infty}$, remains constant during the inflow, the derived accretion rate can be higher up to five orders of magnitude than the classical accretion formula, valid for non-relativistic and non-interacting particles, when typical dark halo conditions are considered. For these typical conditions, the critical point of the flow is located at distances of about 30-150 times the horizon radius. Application of our results to black hole seeds hosted by halos issued from cosmological simulations indicate that dark matter contributes to no more than ~10% of the total accreted mass, confirming that the bolometric quasar luminosity is related to the baryonic accretion history of the black hole.
dc.description7 pages, 6 figures. Accepted for publication in Phys.Rev.D
dc.identifierhttps://arxiv.org/abs/0802.2041
dc.identifierhttp://arxiv.org/abs/0802.2041
dc.identifierPhys.Rev.D77:064023,2008
dc.identifierdoi:10.1103/PhysRevD.77.064023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211110
dc.subjectAstrophysics
dc.titleDark Matter Accretion into Supermassive Black Holes
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