Supermassive black holes surrounded by dark matter modeled as anisotropic fluid: epicyclic oscillations and their fitting to observed QPOs

Dark Matter Accretion into Supermassive Black Holes

Forming supermassive black holes by accreting dark and baryon matter

Given a large-scale mixture of self-interacting dark matter (SIDM) particles and baryon matter distributed in the early Universe, we advance here a two-phase accretion scenario for forming supermassive black holes (SMBHs) with masses around ∼ 109M⊙ at high redshifts z ( > ∼ 6). The first phase is conceived to involve a rapid quasi-spherical and quasi-steady Bondi accretion of mainly SIDM partic...

Black Holes as Dark Matter

While the energy of the universe has been established to be about 0.04 baryons, 0.24 dark matter and 0.72 dark energy, the cosmological entropy is almost entirely, about (1−10), from black holes and only 10 from everything else. This identification of all dark matter as black holes is natural in statistical mechanics. Cosmological history of dark matter is discussed. [email protected]

Supermassive Black Holes from Ultra-strongly Self-interacting Dark Matter

Jason Pollack, ∗ David N. Spergel, and Paul J. Steinhardt 1Walter Burke Institute for Theoretical Physics, Division of Physics, Mathematics & Astronomy, California Institute of Technology, Pasadena, CA 91125 2Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 3Department of Physics and Princeton Center for Theoretical Science, Princeton University, Prin...

Black Holes as Dark Matter Annihilation “Boosters”

The presence and growth of Intermediate and Supermassive Black Holes modify the surrounding distribution of stars and Dark Matter, and inevitably affect the prospects for indirectly detecting Dark Matter through its annihilation products. We show here that under specific circumstances, Black Holes can act as Dark Matter annihilation “boosters”. In particular, we show that mini-spikes, i.e. Dark...