Dark Energy with X-Ray Clusters: Chandra Observations of 41 High-Redshift Clusters from the 400 deg^2 ROSAT PSPC Survey

Details Dark Energy with X-Ray Clusters: Chandra Observations of 41 High-Redshift Clusters from the 400 deg^2 ROSAT PSPC Survey Dark Energy with X-Ray Clusters: Chandra Observations of 41 High-Redshift Clusters from the 400 deg^2 ROSAT PSPC Survey

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1769v&link_type=abstract

Chandra Proposal ID #06800101

Computer Science

Chandra Proposal Id #06800101

Scientific paper

We propose Chandra observations to measure temperature and gas mass in a sample of 41 high-z galaxy clusters from our 400 deg^2 ROSAT survey. This sample is comparable in number to all clusters in the local Universe (z<0.1) above a similar limiting mass, and covers a factor of 3 larger volume at z=0.4-1. Chandra observations will provide the total mass function estimates at =0.4, 0.5, and 0.65, which can be directly compared with the local measurements at =0.05. These data will provide a measurement of the dark energy equation of state via the cluster evolution test which is completely independent from SN Ia and CMB and has different degeneracies. Some targets in this proposal are in common with the HRC GTO proposal 06900018. These programs are not in conflict.

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