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Dynamics and Merging in Compact Galaxy Groups

Published online by Cambridge University Press:  12 April 2016

J.-Q. Zheng ,
M. J. Valtonen ,
A. D. Chernin  and
S. Wiren
J.-Q. Zheng
Affiliation:
Tuorla Observatory, University of Turku, Finland
M. J. Valtonen
Affiliation:
Tuorla Observatory, University of Turku, Finland
A. D. Chernin
Affiliation:
Tuorla Observatory, University of Turku, Finland
S. Wiren
Affiliation:
Tuorla Observatory, University of Turku, Finland

Abstract

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By using a few body code with a frictional force we study the dynamics of small galaxy groups. The results have been compared with observational data on triples and binaries by Karachentsev et al. We start with four to five galaxy groups initially and take samples of the groups when the membership has dropped to two or three. It is possible to find merger evolution models which agree with observations. One interesting factor is the mass-to-light ratio of the observed systems: we find the best fit with the models when the mass-to-light ratio is about 50 in solar units.

Type
Part 3. Numerical Simulations
Information
International Astronomical Union Colloquium , Volume 174: Small Galaxy Groups , 2000 , pp. 299 - 303
Copyright
Copyright © Astronomical Society of the Pacific 2000

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