PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Cosmic-Ray Indirect. CRI- theory
Gamma rays from supernova remnants: time evolution
D. Gaggero*, S. Gabici and F. Zandanel
Full text: pdf
Pre-published on: August 16, 2017
Published on: August 03, 2018
Galactic cosmic rays are believed to be accelerated at supernova remnant shocks.
We model the dynamical evolution of type Ia and type II supernova remnants, and discuss how the maximum energy of accelerated protons and electrons is expected to evolve in time.
In particular, we discuss whether supernova remnants can accelerate protons all the way up to PeV energies, and the crucial role of of magnetic field amplification in this context. The efficiency of field amplification is modeled in a phenomenological way, but some theoretical frameworks that may explain this mechanism are examined (in particular, the non-resonant, current-driven instability proposed by Bell), with emphasis on the role of the slope of the CR spectrum.
In the final part we present the predicted evolution of the SNR gamma-ray spectrum for two benchmark cases of SNR I and II, we discuss in detail the impact of several crucial parameters (gas density, magnetic field inside the remnant, structure of the interstellar medium surrounding the SNR), and eventually compare our predictions with current observations of young SNRs in our Galaxy.
DOI: https://doi.org/10.22323/1.301.0571
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.