Quest for X-ray emission from the large-scale structure between cluster pairs

Details Quest for X-ray emission from the large-scale structure between cluster pairs Quest for X-ray emission from the large-scale structure between cluster pairs

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..112w&link_type=abstract

XMM-Newton Proposal ID #06530402

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Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Rxcj0751.3+1730, Rxcj0751.1+1743

Scientific paper

Our detection of a filament of ~0.9 keV gas connecting the clusters of galaxies Abell 222 and 223 offered one of the first successful glimpses at a small fraction of the missing baryons in the local Universe. To understand the nature and properties of the Warm Hot Intergalactic Medium (WHIM), it is of utmost importance to extend our search to other promising systems. We propose deep (150 ks each) observations of two pairs of clusters of galaxies in which the filament connecting them is expected to lie approximately along our line-of-sight. This favorable geometry will allow us to detect the WHIM down to an average density of 2-3x10^-5 cm^-3, which is only a factor of two to three larger than the densities that we hope to detect with proposed dedicated future missions.

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