2007/03/31 by Aravind Natarajan · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevd.75.123514
published as Phys.Rev.D75:123514,2007 · 12 pages, 4 figures, Minor changes - Expanded captions, added references, detection estimates given, accepted for publication in Phys. Rev. D
arxiv created 2007/05/22 · openalex publication_date 2007/06/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The continuous infall of dark matter with low velocity dispersion from all directions in a galactic halo leads to the formation of caustics which are very small scale (\ensuremath∼parsec) high density structures. If the dark matter is made up of supersymmetric neutralinos, the annihilation of these particles produces a characteristic spectrum of gamma rays which, in principle, could be detected. The annihilation signal at different energy bands is computed and compared with the expected gamma ray background.