X-ray evolution in the ROSAT Brightest Cluster Sample

Details X-ray evolution in the ROSAT Brightest Cluster Sample X-ray evolution in the ROSAT Brightest Cluster Sample

1995-12-15

arxiv.org/abs/astro-ph/9512104v1

Astronomy and Astrophysics

Astrophysics

Uuencoded, compressed PostScript file, 2 pages, 2 figures, to appear in Proc. 'R\"ontgenstrahlung from the Universe', eds. Zim

Scientific paper

We present the X-ray luminosity function (XLF) of the ROSAT Brightest Cluster Sample (BCS), an X-ray selected, flux limited sample of 172 clusters of galaxies at $z\leq 0.3$ compiled from ROSAT All-Sky Survey data. While the bulk of the BCS consists of Abell clusters, the sample also contains Zwicky clusters and purely X-ray selected systems. The BCS-XLF represents the best determination of the local X-ray luminosity function for galaxy clusters and thus provides an important reference for evolutionary studies. For the BCS itself, we find no convincing evidence for cluster evolution within a redshift of $z=0.3$. This result is not in conflict with the findings of the EMSS study on cluster evolution.

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