Gamma Rays from Clusters of Galaxies: Dark Matter versus Cosmic Rays

Details Gamma Rays from Clusters of Galaxies: Dark Matter versus Cosmic Rays Gamma Rays from Clusters of Galaxies: Dark Matter versus Cosmic Rays

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.4114p&link_type=abstract

American Astronomical Society, HEAD meeting #10, #41.14

Computer Science

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Clusters of galaxies have so far not been detected at gamma ray frequencies. However, clusters are likely to host significant gamma ray emissions from cosmic ray interactions with the intra-cluster medium. Additionally, being the largest bound dark matter structures in the Universe, clusters could source a sizable gamma ray signal from dark matter pair annhilation or decay. We explore, for different semi-analytical cosmic ray models and dark matter setups, the spectral features and the spatial distribution of the gamma ray signal from clusters originating from both cosmic rays and dark matter, and compare it to the anticipated GLAST LAT performance.

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