Dynamical constraints on a dark matter density spike at the Galactic Centre from stellar orbits [GA]


In this work, we use current astrometric and spectroscopic data on the S2 star at the Galactic Centre to derive specific constraints on the size of a dark matter density spike around the central supermassive black hole Sgr A*. Our limits are the best direct constraints on a DM spike at the GC for non-annihilating dark matter and exclude a spike with radius greater than a few pc for cuspy outer halos and a few hundred pc for cored outer halos.

Read this paper on arXiv…

T. Lacroix
Mon, 8 Jan 18

Comments: 8 pages, 5 figures