Probing the Intergalactic Medium at Low Redshift

Details Probing the Intergalactic Medium at Low Redshift Probing the Intergalactic Medium at Low Redshift

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..911c&link_type=abstract

Chandra Proposal ID #03700042

Mathematics

Logic

Chandra Proposal Id #03700042

Scientific paper

Cosmological hydrodynamic simulations predict that a substantial fraction of the baryonic material at low redshift should be in the form of a warm/hot (log T = 5-7) intergalactic medium (WHIM). We propose to observe three X-ray bright quasars (3C 279, 1H 0414+009, 1ES 1028+511) with the Chandra HETGS to search for the absorption produced by this WHIM gas and determine whether it can account for the apparent baryon deficit in the present-day universe. Our simulations show that we should be able to detect several resonant absorption lines from highly-ionized metals (such as O VII and O VIII) in the WHIM gas. These data will also be useful for studying absorption and/or emission lines intrinsic to the quasars.

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