Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-02-02
Astronomy and Astrophysics
Astrophysics
Latex, 21 pages, aaspp.sty, 11 figures and epsf.sty included, appended as a uuencoded, gzipped tar file, accepted for publicat
Scientific paper
10.1086/117917
We present a study of the surface density profiles of the clusters of galaxies from the Palomar Distant Cluster Survey (Postman et al. 1996). The survey contains a total of 79 clusters of galaxies, covering the estimated redshift range of $0.2 \simless z \simless 1.2$. We have analyzed the richest clusters in this sample and find that the typical Palomar cluster has a surface density profile of $r^{-1.4}$ ($r \ge 0.10~h^{-1}~{\rm Mpc}$) and a core radius of $0.05~h^{-1}~{\rm Mpc}$. There may be an indication that the slope of the surface density profile steepens with increasing redshift, though the observational uncertainty is at present too large to be conclusive. Our cluster population is inconsistent at a 99.9\% confidence level with a population of azimuthally symmetric clusters.
Lubin Lori Maxine
Postman Marc
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