Accurate Mass Measurements and Baryon Budget in 2 KEV Galaxy Clusters

Details Accurate Mass Measurements and Baryon Budget in 2 KEV Galaxy Clusters Accurate Mass Measurements and Baryon Budget in 2 KEV Galaxy Clusters

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.2027v&link_type=abstract

Chandra Proposal ID #07800437

Mathematics

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Chandra Proposal Id #07800437

Scientific paper

We propose ACIS-I observations of 2 typical X-ray selected poor clusters. Our objects are both bright and sufficiently distant (z=0.07) so that they can be observed to a large fraction of virial radius in a single ACIS-I pointing. The Chandra observations will provide accurate mass profiles to r_500. In combination with the optical observations, we will be able to establish the baryon budget (gas, stars, total mass) in 2keV clusters, precisely calibrate the M-T relation down to the group scales, and quantify any trends in the baryon fraction from rich clusters to groups. These data will have important implications for the thermal history of the intergalactic medium and cluster-based cosmological tests.

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