N-Body Simulations of Small Galaxy Groups

Astronomy and Astrophysics – Astrophysics

Scientific paper

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(16 pages, 12 figures; 3 in jpg format) Submitted to RevMexAA

Scientific paper

A series of N-body simulations aimed to study the dynamics of small groups of galaxies are presented. The properties of small galaxy groups are very well reproduced, and those of Hickson's compact groups are well reproduced by the most advanced stage of collapsing groups. We find no overmerging problem in our simulations. An important fraction of groups (~40%) initially in virial equilibrium can last for ~10 Gyr without complete merging. These results provide an alternative solution to the overmerging expected in Hicksons's compact groups.

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