Laurence P. David, Christine Jones, William Forman
We obtained a deep 150 ksec Chandra observation of the optically selected
cluster of galaxies, RCS 2318+0034, to investigate the gas mass fraction in
this system. Combining our deep Chandra observation with an archival 50 ksec
observation, we derive gas mass fractions of fgas=0.061 and 0.13 within r2500
and r500, respectively. The gas mass fraction in RCS 2318+0034 within r500 is
typical of X-ray selected clusters. Further study shows that the large scale
properties of RCS 2318+0034, including the relations between gas mass, X-ray
luminosity and gas temperature are also consistent with the observed
correlations of X-ray selected clusters. However, the gas mass fraction within
r2500 is less than most X-ray selected clusters, as previously reported. The
deep {\it Chandra} image of RCS 2318+0034 shows that this system is presently
undergoing a major merger which may have an impact on the inferred gas mass
fraction within r2500.
View original:
http://arxiv.org/abs/1109.5067
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