Cold Fronts in Groups and Clusters and their Dynamical State in the Optical

Details Cold Fronts in Groups and Clusters and their Dynamical State in the Optical Cold Fronts in Groups and Clusters and their Dynamical State in the Optical

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011scgg.conf...16g&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

Computer Science

Scientific paper

Cold fronts are found both in merging and in cool core relaxed clusters. In merging clusters cold fronts mark the discontinuity among the merging subcluster and the less dense surrounding ICM. In relaxed clusters cold fronts are likely induced by minor mergers that produce a sloshing mechanism of the low entropy gas in the core. For a sample of clusters we combine the existence of a cold front with indicators of dynamical activity in the optical: presence of substructure and peculiar velocity of the BCG. We extend this comparison to the few sloshing cold fronts in groups currently known. We present A 2028 which shows the unique combination of a corona close to a cold front constraining in principle the stripping of coronae and the velocity field creating cold fronts.

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