We present a preliminary analysis of the X-ray properties of a sample of poor clusters of galaxies from the ROSAT All-Sky Survey. Our poor cluster sample is composed of 339 groups from a larger sample of 732 poor clusters, spanning the entire range of richness from very poor systems to Abell clusters. This allows us to examine the X-ray properties of poor clusters spanning 3 orders of magnitude in the cluster mass function. We discuss the construction of the overall poor cluster catalog as well as the volume-limited sample. Additionally, we present a preliminary X-ray luminosity function (XLF), and compare it with other group XLFs as well as extrapolated cluster XLFs. We also discuss correlations between X-ray luminosity/morphology and optical richness/morphology. This work was supported by NSF grant AST-9896039 and NASA grant NAG5-6772.
American Astronomical Society Meeting Abstracts
- Pub Date:
- December 1998