Dark Matter and Dark Radiation from Evaporating Kerr Primordial Black Holes

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]

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...

Dark Matter Accretion into Supermassive Black Holes

Dark matter and dark radiation

Lotty Ackerman, Matthew R. Buckley, Sean M. Carroll, and Marc Kamionkowski California Institute of Technology, Pasadena, California 91125, USA (Received 16 December 2008; published 23 January 2009) We explore the feasibility and astrophysical consequences of a new long-range Uð1Þ gauge field (‘‘dark electromagnetism’’) that couples only to dark matter, not to the standard model. The dark matter...

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...