X-ray Clusters in the ACT Strip

Details X-ray Clusters in the ACT Strip X-ray Clusters in the ACT Strip

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21344808h&link_type=abstract

American Astronomical Society, AAS Meeting #213, #448.08; Bulletin of the American Astronomical Society, Vol. 41, p.336

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Scientific paper

The Atacama Cosmology Telescope (ACT) is surveying a strip of sky in the southern hemisphere around a declination of -55 degrees. One of the goals of the ACT project is to produce a sample of massive galaxy clusters selected through their Sunyaev-Zel'dovich Effect (SZE). In order to support the interpretation of the SZE in these clusters, we have begun a study of known X-ray-bright clusters in the ACT survey region. In this poster we present results from archival Chandra and HST data on Abell S0592 (RXC J0638.7-5358). The cluster appears to be in a fairly advanced stage of a major merger. The Chandra image shows two bright, cool cores (kT 6 keV) separated by 40 arcseconds surrounded by generally hotter gas (kT 8 keV). The HST data show a bright CD-type galaxy near the center of each of the X-ray peaks: the east galaxy is well centered on its X-ray peak, but the other is clearly offset from the western X-ray peak. We discuss the implications of the complex nature of this cluster on its expected SZE signal.
Financial support was provided by the NSF under the PIRE program (OISE-0530095).

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