A New Model for the Thermal X-ray Composites and the Proton Origin Γ-rays from Supernova Remnants

Recent nonthermal X-ray and γ-ray observations, attributed to electron emission processes, for the first time give an experimental confirmation that electrons are accelerated on SNR shocks up to the energy ∼ 10 eV. We have no direct observational confirmations about proton acceleration by SNR. Different models of γ-emission from SNRs predict different emission mechanisms as dominating. Only π o decays created in proton-nucleon interactions allow us to look inside the CR nuclear component acceleration processes. A new model for the thermal X-ray composites strongly suggest that thermal X-ray peak inside the radio shell of SNR tells us about entering of one part of SNR shock into a denser medium compared with other parts of the shell. This makes a TXCs promising sites for γ-ray generation via πo decays. Detailed consideration of SNR-cloud interaction allows to increase an expected proton induced γ-ray flux from SNR at least on an order of magnitude, that allows to adjust the theoretical πo decay γ-luminosities with observed fluxes at least for a few SNRs even for low density (no ∼ 10 1 ÷ 10 cm) cloud.