Computer Science
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001tysc.confe.174h&link_type=abstract
Two Years of Science with Chandra, Abstracts from the Symposium held in Washington, DC, 5-7 September, 2001, meeting abstract.
Computer Science
Clusters Of Galaxies
Scientific paper
We present results from Chandra/ACIS-S imaging observations of two distant clusters, A2219 (z = 0.228) and A2104 (z = 0.155), both of which show evidence for gravitational lensing. A2219 is a massive, X-ray luminous cluster, with a high mean X-ray temperature of about kT ≈ 12 keV. Despite having a smooth, elliptical X-ray surface brightness distribution, evidence from gravitational lensing and from the X-ray temperature map are consistent with the interpretation that A2219 is an ongoing merger. A2104 is a much cooler (kT ≈ 8 keV) and somewhat less luminous cluster which appears to be more dynamically relaxed. Using these data, we estimate cluster masses and provide constraints on the matter distribution in the cluster cores which will be compared with published gravitational lensing models. Support for this work was provided by NASA through Chandra Award Number GO0-1122X issued by the Chandra X-Ray Observatory Center, which is operated by SAO on behalf of NASA under contract NAS8-39073.
Davis David S.
Houck John C.
Wise Michael Wayne
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