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Compact and Fossil Groups

Published online by Cambridge University Press:  01 August 2006

Claudia Mendes de Oliveira  and
Philippe Amram
Claudia Mendes de Oliveira
Affiliation:
Dept. of Astronomy, IAG/USP, R. do Matão 1226, 05508-090, São Paulo email: oliveira@astro.iag.usp.br and Laboratoire d'Astrophysique de Marseille, OAMP, Université de Provence, CNRS, France
Philippe Amram
Affiliation:
Dept. of Astronomy, IAG/USP, R. do Matão 1226, 05508-090, São Paulo email: oliveira@astro.iag.usp.br and Laboratoire d'Astrophysique de Marseille, OAMP, Université de Provence, CNRS, France
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Abstract

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We present a short review on poor groups of galaxies focusing on the evolution of compact groups and formation of fossil groups. Fossil groups are systems with one dominant luminous elliptical galaxy surrounded by faint companions, in an extended X-ray halo. We will briefly discuss the possibility of fossil groups being the end-products of the merging of compact groups.

Keywords

cosmology: observations–galaxies: clusters: individual: HCG 31HCG 62HCG 79HCG 92RX J1552.2+2013RX J1416.4+2315–galaxies: evolution–galaxies: interactions–galaxies: luminosity functionmass function–galaxies: kinematics and dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 160 - 164
Copyright
Copyright © International Astronomical Union 2007

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