Title

Constraints on a Non-thermal History from Galactic Dark Matter Spikes

Author(s)/Creator(s)

Scott Watson, Department of Physics, Syracuse University, Syracuse, NY
Pearl Sandick, Theory Group and Texas Cosmology Center, The University of Texas at Austin, TX

Document Type

Article

Date

2-14-2011

Language

English

Disciplines

Physics

Description/Abstract

In this paper we examine whether indirect detection constraints on dark matter associated with a non-thermal history may be significantly improved when accounting for the presence of galactic substructure in the form of dark matter spikes. We find that significant constraints may be derived from the non-observation of an excess of diffuse gamma-rays and from the properties of bright gamma-ray point sources observed by the Fermi Gamma-Ray Space Telescope, but these constraints depend sensitively on the details of the formation of the first stars and their subsequent black hole remnants. However, we also find that, especially if WIMPs annihilate primarily to quarks or gauge bosons, it is possible to extract meaningful and conservative bounds on the annihilation cross section.

Additional Information

8 pages, 3 figures More informaton at http://arxiv.org/abs/1102.2897

Recommended Citation

Watson, Scott and Sandick, Pearl, "Constraints on a Non-thermal History from Galactic Dark Matter Spikes" (2011). Physics - All Scholarship. 398.
https://surface.syr.edu/phy/398

Source

Harvested from Arxiv.org