Mathematics – Logic
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phdt.........9k&link_type=abstract
Thesis (PhD). HARVARD UNIVERSITY, Source DAI-B 61/05, p. 2576, Nov 2000, 254 pages.
Mathematics
Logic
2
Scientific paper
The AWM and MKW poor clusters form a complete nearby sample of poor clusters that span a range of velocity dispersions and populations; they were selected on the basis of a cD-like galaxy at their centers. I describe a photometric and kinematic study of AWM 7, the richest cluster in the sample, and extend the galaxy sample to perform a detailed analysis of the mass profile of this cluster. I assess the performance of the virial mass estimator under a variety of assumptions about the orbital anisotropy profile. I then describe an extensive kinematic analysis of 17 AWM and MKW clusters, investigating velocity distributions, spectral segregation, velocity dispersion profiles, and X-ray properties. This section establishes a robust observational baseline for comparison to simulations. The AWM and MKW clusters are as varied in their properties as their richer counterparts, and are globally no different from poor clusters without cD galaxies. This similarity suggests that the formation of the cD in such clusters is governed by local physics, independent of the global cluster properties. Finally, I describe and analyze high-resolution N-body simulations of poor clusters that are a good match to the AWM and MKW clusters in mass, galaxy population, and velocity dispersion. The simulations consist of ~10 million particles, of which typically 2 million constitute the final virialized region. The simulations track galaxies and dark matter separately, permitting an analysis of the morphological evolution of the galaxy population. I summarize the kinematic properties of the simulated clusters and their evolution with redshift, I compare them to the observed sample of AWM and MKW clusters, and test the accuracy with which the standard virial mass estimator recovers the true underlying mass profile. The virial estimator recovers the total mass accurately on average, but systematically overestimates the mass profile interior to the virial radius.
No associations
LandOfFree
Kinematics and evolution of poor clusters of galaxies 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 Kinematics and evolution of poor clusters of galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinematics and evolution of poor clusters of galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1115649