Formation and Evolution of Galactic Halos in Clusters of Galaxies

Abstract

We investigate effects of time evolution of a rich cluster of galaxies on its member galactic halos in the standard cold dark matter (SCDM) universe using high resolution N-body simulations. We identify several hundred galactic halos within virial radius of our simulated cluster. We also find that a large number of halos have been tidally disrupted at z = 0. Therefore we improve a method of deriving merging history trees of galaxies taking account of tidally stripped galaxies.

20 pages, 14 Postscript figures, uses AASTeX, accepted for publication in ApJ

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