Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-05-12
JCAP 1002:025,2010
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
7 pages, 3 figures, somewhat revised, published in JCAP
Scientific paper
10.1088/1475-7516/2010/02/025
We show that the hard X-ray (HXR) emission observed from several galaxy clusters is naturally explained by a simple model, in which the nonthermal emission is produced by inverse Compton scattering of cosmic microwave background photons by electrons accelerated in cluster accretion shocks: The dependence of HXR surface brightness on cluster temperature is consistent with that predicted by the model, and the observed HXR luminosity is consistent with the fraction of shock thermal energy deposited in relativistic electrons being \lesssim 0.1. Alternative models, where the HXR emission is predicted to be correlated with the cluster thermal emission, are disfavored by the data. The implications of our predictions to future HXR observations (e.g. by NuStar, Simbol-X) and to (space/ground based) gamma-ray observations (e.g. by Fermi, HESS, MAGIC, VERITAS) are discussed.
Kushnir Doron
Waxman Eli
No associations
LandOfFree
Hard X-ray emission from accretion shocks around galaxy clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hard X-ray emission from accretion shocks around galaxy clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hard X-ray emission from accretion shocks around galaxy clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-128100