Gamma-Ray Observations of Clusters of Galaxies
Abstract
High energy gamma-ray data of a few selected clusters of galaxies, observed by the SAS-2 mission, were analyzed. The clusters include Coma, Virgo, A401, A754, A1060, A1367, A2142 and A2319. The 2 sigma upper limits on the emission from these clusters range from 3 times 10(-7) to 3 times 10(-6) ph cm(-2) s(-1) in the energy range (35-200) MeV. We discuss gamma-ray contributions from the intracluster gas, dark matter and individual galaxies. Implications of SAS-2 and EGRET results for cosmic ray fluxes and magnetic field values are also discussed. star Visiting Fellow from Cukurova University, Adana, Turkey
- Publication:
-
American Astronomical Society Meeting Abstracts #186
- Pub Date:
- March 1995
- Bibcode:
- 1995AAS...186.0704A