Detecting the Warm-Hot IGM in Large-Scale Structures

Details Detecting the Warm-Hot IGM in Large-Scale Structures Detecting the Warm-Hot IGM in Large-Scale Structures

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2459z&link_type=abstract

Chandra Proposal ID #09900679

Physics

Chandra Proposal Id #09900679

Scientific paper

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 is expected to be denser and much easier to detect than the low density one targeted so far along random lines of sight through absorption line studies (with controversial results). Moreover, searching for WHIM signatures in known LSS is safer and much more robust, since redshift of the absorber is known a priori. This efficient method of investigating WHIM has yet to be fully exploited. We have identified 12 bright blazars in the background of LSS. We propose to probe the WHIM in these structures by identifying the associated absorption lines in the LETG/HRC-S spectrum of these AGNs in outburst phase.

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