Unveiling the baryons in large-scale structures

Details Unveiling the baryons in large-scale structures Unveiling the baryons in large-scale structures

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop..165z&link_type=abstract

XMM-Newton Proposal ID #05043713

Physics

Cosmology, Extragalactic Deep Fields And Area Surveys, 1Es 0120+340, 1Es 0229+200, 1Es 0235+164, Bl Lac, 1Es 2321+419, 1Es 1011+496, H 2356-309, 1Es 1212+078, On 231, 3Eg J1200+2847, H 1219+305, On 325, Pks 2255-282, Xmm-Newton Proposal 05043713

Scientific paper

Simulations and observations indicate that galaxy overdensities are good tracers of the dark matter large-scale structures (LSS) and therefore of the diffuse warm-hot phase (WHIM) that should be associated with them. The WHIM in LSS should have large column densities, and therefore should be much easier to detect than the low density WHIM targeted so far through absorption line studies on random lines of sight (with controversial results). The strategy of searching for WHIM signatures in known LSS is safer and more robust, since the redshift of the absorber is known a priori. We have selected 13 bright blazars just in the background of 6 known LSS. We propose to observe these blazars (in outburst phase) with 2 TOO observations of 100ks each to probe the WHIM in the foreground LSS.

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