Are massive clusters always X-ray luminous?

Details Are massive clusters always X-ray luminous? Are massive clusters always X-ray luminous?

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..135s&link_type=abstract

XMM-Newton Proposal ID #06538106

Other

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, A2245, A1035, A2048

Scientific paper

Studies of galaxy clusters are important for both cosmology and the formation of baryonic structures. An important relation in cluster science is the f_gas - M relation. However, the cluster samples used to constrain this relation are X-ray selected and the current XMM and Chandra archives are also heavily biased to X-ray selected clusters. To address this important bias, we construct a sample of 18 most massive clusters from the SDSS-C4 cluster catalog. Nine of them have been observed by XMM or Chandra but they are all X-ray luminous, while eight of the other nine unobserved clusters are X-ray faint. We propose to observe these nine unobserved clusters to complete this unique sample, with potentially important implications on the cluster mass - proxy relations.

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