Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..220..217r&link_type=abstract
In: High energy gamma-ray astronomy; Proceedings of the International Conference, Ann Arbor, MI, Oct. 2-5, 1990 (A93-25001 08-93
Astronomy and Astrophysics
Astronomy
Cosmic Rays, Dark Matter, Gamma Ray Telescopes, Particle Flux Density, Particle Mass, Big Bang Cosmology, Gamma Ray Astronomy, Particle Theory
Scientific paper
It is argued that particle physics and cosmological considerations can be used to delineate the allowed magnitude of a possible HE/VHE gamma-ray line signal of Galactic dark matter. It is shown that dark matter annihilation may lead to a cosmic gamma-ray line flux whose magnitude is bounded by a roughly parallelogram-shaped area in the flux-energy plane. Such a line signal could be enhanced by dark matter clumping. For example, there could be a dark matter core in the Galactic center, so a search in that direction (with appropriately good angular resolution) could lead to a signal-to-background ratio larger by perhaps an order of magnitude as compared to the case of the Galactic pole under consideration. A large electromagnetic detection, with state-of-the-art energy resolution, put on a space station, could potentially gather fundamental information on the nature of the most prevalent form of matter in the universe.
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