Theory of galaxy dynamics in clusters and groups

Details Theory of galaxy dynamics in clusters and groups Theory of galaxy dynamics in clusters and groups

1999-11-17

arxiv.org/abs/astro-ph/9911333v3

in XVth IAP meeting, Dynamics of Galaxies: from the Early Universe to the Present, ed. F. Combes, G.A. Mamon & V. Charmandaris

Astronomy and Astrophysics

Astrophysics

Review at XVth IAP meeting on Galaxy Dynamics: from the Early Universe to the Present. Ed. F. Combes, G. A. Mamon & V. Charman

Scientific paper

Analytical estimates of the mass and radial dependence of the rates of galaxy mergers and of tidal interactions are derived for clusters and groups of galaxies, taking into account the tides from the system potential that limit the sizes of galaxies. Only high mass galaxies undergo significant major merging before being themselves cannibalized by more massive galaxies. Strong tides from the group/cluster potential severely limit the merger/tide cross-sections in the central regions, and while tides are most efficient at the periphery, one should see merging encounters further inside rich clusters.

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