X-ray Cluster Evolution from ROSAT Survey

Details X-ray Cluster Evolution from ROSAT Survey X-ray Cluster Evolution from ROSAT Survey

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.0610v&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #06.10; Bulletin of the American Astronomical Society, Vol. 28, p.830

Astronomy and Astrophysics

Astronomy

Scientific paper

We investigate the properties of X-ray clusters detected on the basis of the spatial extent of their X-ray emission in a set of 250 ROSAT/PSPC pointed observations at high galactic latitudes. We detect 107 clusters in a surveyed area of 40 square degrees. An optical identification program is underway. Having few available redshift measurements, we attempt to address the following questions: 1) What is the ``quality'' of the X-ray selected sample? and; 2) What can the X-ray data alone tell us about the evolution of cluster parameters? We find that the statistical properties of the sample are well-understood, and that the data show no evidence for strong evolution of X-ray clusters out to z ~ 0.5-1. Future redshift measurements should not drastically change our conclusions.

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