Mathematics – Logic
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21344822h&link_type=abstract
American Astronomical Society, AAS Meeting #213, #448.22; Bulletin of the American Astronomical Society, Vol. 41, p.339
Mathematics
Logic
Scientific paper
With the advent of high-resolution X-ray imaging, X-ray point sources are easily identified, even those embedded in the intracluster medium (ICM) of galaxy clusters. Comparisons of galaxy clusters at different redshifts can potentially obscure any true evolution, particularly in galaxies hosting AGN. Guided by cosmological simulations we select a sample of clusters at various epochs that are predicted to end with X-ray properties of the present day Coma Cluster. In this first investigation of the low redshift "Road to Coma" sample, we find that almost all cluster X-ray point sources and radio galaxies are hosted by passive galaxies. With more than 50% located within 0.5 Mpc radius, X-ray point sources do not overlap with radio galaxies and limits on their radio/X-ray fluxes indicate two separate populations. We will discuss the nature of these X-ray point sources and the overall importance of distributed cluster heating and cooling of the ICM. This research is supported by Chandra Archive/Theory Grant AR8-9013X.
Ellingson Erica E.
Evrard August
Hallman Eric
Hart Quyen N.
Stocke John
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