Challenging the merger-sloshing cold front paradigm with an observation of A2142

Details Challenging the merger-sloshing cold front paradigm with an observation of A2142 Challenging the merger-sloshing cold front paradigm with an observation of A2142

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..189r&link_type=abstract

XMM-Newton Proposal ID #06745601

Computer Science

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, A2142

Scientific paper

A2142 is the first cluster in which cold fronts were observed. Two striking surface brightness discontinuities are visible even to an untrained eye in Chandra images and the pressure profiles are almost continuous across them, providing textbook examples of cold fronts. However, A2142 does not fit within the now dominant scenario, that describes cold fronts either as the edges of merging subclusters or as the cool cores ``sloshing'' in the potential well of their host cluster. This ambiguity may be due to an incomplete picture of the dynamical state of A2142 or alternatively to the inadequacy of the current scenario of cold front formation. We propose a 50 ks XMM-Newton observation to characterize the dynamical state of A2142 well enough to resolve this issue.

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