Gamma ray emission from a baryonic dark halo+

Details Gamma ray emission from a baryonic dark halo+ Gamma ray emission from a baryonic dark halo+

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000njph....2...12d&link_type=abstract

New Journal of Physics, Volume 2, Issue 1, pp. 12 (2000).

Physics

Scientific paper

A re-analysis of EGRET data by Dixon et al has led to the discovery of a statistically significant diffuse gamma-ray emission from the galactic halo. We show that this emission can naturally be accounted for within a previously proposed model for baryonic dark matter, according to which dark clusters of brown dwarfs and cold self-gravitating H2 clouds populate the outer galactic halo and can show up in microlensing observations. Basically, cosmic-ray protons in the galactic halo scatter on the clouds clumped into dark clusters, giving rise to the observed gamma-ray flux. We derive maps for the corresponding intensity distribution, which turn out to be in remarkably good agreement with those obtained by Dixon et al. We also address future prospects to test our predictions.

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