International School of Cosmic Ray Astrophysics
<< Maurice M. Shapiro >>
17th Course: "Astro & Particle Physics: From Underground to Outer Space"
11-18 July 2010
Ettore Majorana Centre
Erice, Sicily, Italy
H.E.S.S and MAGIC experiments are the first to produce images of supernova remnants (SNRs) in the very-high energy gamma-ray range. Since 2004 there are more than 10 SNRs with known pattern of surface brightness distribution in TeV gamma-rays. The main sources of this radiation are electrons (due to inverse-Compton scattering) and protons (due to pion decays).
Analysis of the broad-band spectra of SNRs showed that both electrons and protons may be responsible for TeV gamma-rays. Observed images of SNRs, in addition to the spectra, might provide criteria to distinguish between these two scenarios. We present a method to synthesize gamma-ray images of SNRs due to hadronic emission. It includes a classic model of accelerations of protons and hydrodynamics of shocks in uniform interstellar medium. The synthesized maps of surface brightness distribution of SNRs are analysed and compared with the leptonic gamma-ray images.