Dynamical and content evolution of a sample of clusters from z~0 to z~0.5

Details Dynamical and content evolution of a sample of clusters from z~0 to z~0.5 Dynamical and content evolution of a sample of clusters from z~0 to z~0.5

2000-09-05

arxiv.org/abs/astro-ph/0009063v1

Astronomy and Astrophysics

Astrophysics

11 pages, 4 figures, accepted in A&A

Scientific paper

In this paper, we present an analysis of the dynamics and segregation of galaxies in rich clusters from z~0.32 to z~0.48 taken from the CFHT Optical PDCS (COP) survey and from the CNOC survey (Carlberg et al. 1997). Our results from the COP survey are based upon the recent observational work of Adami et al. (2000) and Holden et al. (2000) and use new spectroscopic and photometric data on six clusters selected from the Palomar Distant Cluster Survey (PDCS; Postman et al. 1996). We have compared the COP and CNOC samples to the ESO Nearby Abell Cluster Survey (ENACS: z~0.07). Our sample shows that the z<0.4 clusters have the same velocity dispersion versus magnitude, morphological type and radius relationships as nearby Abell clusters. The z~0.48 clusters exhibit, however, departures from these relations. Furthermore, there appears to be a higher fraction of late-type (or bluer, e.g. Butcher and Oemler, 1984) galaxies in the distant clusters compared to the nearby ones. The classical scenario in which massive galaxies virialize before they evolve from late into early type explain our observations. In such a scenario, the clusters of our sample began to form before a redshift of ~0.8 and the late-type galaxy population had a continuous infall into the clusters.

Affiliated with

Also associated with

No associations

Rating

Dynamical and content evolution of a sample of clusters from z~0 to z~0.5 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamical and content evolution of a sample of clusters from z~0 to z~0.5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical and content evolution of a sample of clusters from z~0 to z~0.5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-433107