High Resolution XMM-Newton Spectroscopy of a Cool Core Cluster Abell 3112

Details High Resolution XMM-Newton Spectroscopy of a Cool Core Cluster Abell 3112 High Resolution XMM-Newton Spectroscopy of a Cool Core Cluster Abell 3112

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011scgg.conf....3b&link_type=abstract

"Structure in Clusters and Groups of Galaxies in the Chandra Era, 2011 Chandra Science Workshop held July 12-14, 2011. Edited by

Astronomy and Astrophysics

Astrophysics

Scientific paper

XMM-Newton and Chandra observations have revealed that some physical mechanisms act as an inhibitor 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 gas. This disproves the theory that strong soft excess emission has a thermal origin.

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