Ponente
Descripción
Supernova remnants are discussed as the main sources for Galactic cosmic-rays. However, observational and theoretical developments in the last decade have lead to the idea that only supernova explosions in very dense circumstellar media are able to accelerate particles to the relevant energies and only in the first decades after the explosion.
The medium around massive stars tends to be highly structured on account of the non-steady mass-loss history of the progenitor stars and the interaction of the stellar winds with the medium around them. We used RATPaC to simulate the propagation of and particle acceleration at supernova remnants shocks in the medium around Red Supergiants and Luminous Blue Variable stars, that can feature very dense circumstellar shells. We find that the shock-shell interactions can boost the achievable particle energy beyond a few PeV. Based on our simulations, we discuss the multi-wavelength signatures that can be expected from radio to gamma-ray energies and propose a revised observation strategy for current and future gamma-ray observatories to catch such events.
