2000/11/03 by M. Arnaud, N. Aghanim, R. Gastaud +16 · 7 citations
Physics and Astronomy · #Accretion (finance) #Adiabatic process #Astronomy #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Star Formation Studies #Brightest cluster galaxy #Cluster (spacecraft) #Coma (optics) #Coma Cluster #Computer science #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Geography #Geology #Physics #RADIUS #Virial theorem #astro-ph
paper · pdf · doi:10.1051/0004-6361:20000195
7 pages, 8 figures, Accepted for publication in A&A (special Letter issue on XMM)
arxiv created 2000/11/03 · openalex publication_date 2000/11/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/21
We present a temperature map and a temperature profile of the central part (r < 20' or 1/4 virial radius) of the Coma cluster. We combined 5 overlapping pointings made with XMM/EPIC/MOS and extracted spectra in boxes of 3.5' X 3.5'. The temperature distribution around the two central galaxies is remarkably homogeneous (r<10'), contrary to previous ASCA results, suggesting that the core is actually in a relaxed state. At larger distance from the cluster center we do see evidence for recent matter accretion. We confirm the cool area in the direction of NGC 4921, probably due to gas stripped from an infalling group. We find indications of a hot front in the South West, in the direction of NGC4839, probably due to an adiabatic compression.