Dynamics of dwarf galaxies disfavor stellar-mass black hole dark matter
Astrophysics of Galaxies
2017-08-08 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We study the effects of black hole dark matter on the dynamical evolution of stars in dwarf galaxies. We find that mass segregation leads to a depletion of stars in the center of dwarf galaxies and the appearance of a ring in the projected stellar surface density profile. Using Segue 1 as an example we show that current observations of the projected surface stellar density rule out at the 99.9% confidence level the possibility that more than 6% of the dark matter is composed of black holes with a mass of few tens of solar masses.
Keywords
Cite
@article{arxiv.1704.01668,
title = {Dynamics of dwarf galaxies disfavor stellar-mass black hole dark matter},
author = {Savvas M. Koushiappas and Abraham Loeb},
journal= {arXiv preprint arXiv:1704.01668},
year = {2017}
}
Comments
5 pages, 3 figures Replaced to match version accepted for publication in Physical Review Letters