Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.3906b&link_type=abstract
American Astronomical Society, HEAD meeting #12, #39.06
Astronomy and Astrophysics
Astrophysics
Scientific paper
XMM-Newton and Chandra observations have revealed that some physical mechanisms act as inhibitors to prevent cool gas to infall onto central cD galaxies. Understanding what happened to the cool gas in cooling flow clusters was one of the prime problems in extragalactic astrophysics until analysis of the XMM-Newton RGS spectra showed that they do not, in fact, cool beyond a temperature about one-third of the virial temperature. We examine high signal to noise XMM-Newton RGS and EPIC observations to determine the physical characteristics in the cool core and outskirts of the nearby rich cluster A3112. The lack of any Fe XVII and Fe XVIII lines in the RGS spectra confirms the absence of any cool (<1 keV) gas. We also note that Abell 3112 has been suggested as a cluster with strong soft excess emission. However using the latest ESAS background subtraction techniques, we do not detect any evidence for soft excess emission from this cluster.
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