PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - CRD - Cosmic Ray Direct
Unfolding of the vortical amplification of the magnetic field at inward shocks of Supernova remnant Cassiopeia A
F. Fraschetti*, S. Katsuda, T. Sato, J. Giacalone and J.R. Jokipii
Full text: pdf
Pre-published on: July 30, 2021
Published on:
Observational evidence of strongly amplified magnetic fields at interstellar supernova remnant (SNR) shocks has been proposed to result from downstream small scale dynamo; however, quantitative comparison with observations of X-ray time variability has been not extensively explored. We present an interpretation of the time variability of the X-ray flux reported from a 15 years multi-epoch observational campaign of the supernova remnant Cassiopeia A by Chandra. The increase of the [4.2-6] keV non-thermal flux up to 50% is shown quantitatively to trace the growth of the magnetic field due to vortical amplification mechanism downstream of inward shocks colliding with inner overdensities. The fast synchrotron cooling as compared with shock-acceleration time scale is consistent with the subsequent flux decrease.
DOI: https://doi.org/10.22323/1.395.0175
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.