We investigate the escape of cosmic-rays (CRs) accelerated at the shock front of a supernova remnant (SNR). For that purpose, we solve a transport equation for the CRs from the vicinity of the shock front to the region far away from the front. We consider the amplification of Alfvén waves through CR streaming and the scatter of CRs by the waves. We found that the waves grow enough to delay the propagation of the CRs even far away from the shock front. Our results indicate that the gamma -ray spectra observed at molecular clouds illuminated by the CRs escaped from SNRs are significantly affected by the wave amplification.
Memorie della Societa Astronomica Italiana
- Pub Date:
- ISM: clouds;
- cosmic rays;
- ISM: supernova remnants