2014/01/22 by L. Saha, T. Ergin, P. Majumdar +3
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Cassiopeia A #Context (archaeology) #Electron #Fermi Gamma-ray Space Telescope #Gamma ray #Gamma-ray bursts and supernovae #Nuclear physics #Observatory #Particle acceleration #Physics #Solar and Space Plasma Dynamics #Spitzer Space Telescope #Supernova #Supernova remnant #Telescope #astro-ph.HE
paper · pdf · doi:10.1051/0004-6361/201323218
published as A&A, Volume 563, A88 (2014) · Accepted in A&A
arxiv created 2014/01/22 · openalex publication_date 2014/02/11 · arxiv updated 2018/03/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Context. Non-thermal X-ray emission from the shell of Cassiopeia A (Cas A) has been an interesting subject of study, as it provides information about relativistic electrons and their acceleration mechanisms in shocks. The Chandra X-ray observatory revealed the detailed spectral and spatial structure of this supernova remnant in X-rays. The spectral analysis of the Chandra X-ray data of Cas A shows unequal flux levels for different regions of the shell, which can be attributed to different magnetic fields in those regions. Additionally, the GeV gamma-ray emission observed by the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope showed that the hadronic processes are dominating in Cas A, which is a clear signature of acceleration of protons.