Mathematics – Logic
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2900d&link_type=abstract
Chandra proposal ID #11800194
Mathematics
Logic
Scientific paper
The independence of the gas mass fraction in clusters of galaxies as a function of redshift is a key assumption in some precision cosmological studies. However, there is very little empirical evidence at the present time to support this claim. A recent study found that the gas mass fraction in a sample of optical selected clusters at intermediate redshifts (0.6 < z < 1.1) is substantially lower than that determined from nearby X-ray selected clusters. We propose a deep Chandra observation of the RCS 2318+0034 cluster, which has a reported gas mass fraction of 1.5%, compared to the average for X-ray selected nearby clusters of about 13%, to more accurately determine the gas mass fraction in this cluster.
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