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On the Nature of Fossil Galaxy Groups

Bibcode
2010ASPC..421..225L
La Barbera, F.; de Carvalho, R. R.; de La Rosa, I. G.; Sorrentino, G.; Gal, R. R.; Kohl-Moreira, J. L.
Bibliographical reference

Galaxies in Isolation: Exploring Nature Versus Nurture, proceedings of a conference held 12 to 15 May 2009 in Granada, Spain. Edited by Lourdes Verdes-Montenegro, Ascencíon del Olmo, and Jack Sulentic. San Francisco: Astronomical Society of the Pacific, 2010., p.225

Advertised on:
10
2010
Number of authors
6
IAC number of authors
0
Citations
2
Refereed citations
2
Description
We present a new sample of 25 fossil groups (FGs) at z<0.1. Both the global properties of FGs (e.g. X-ray luminosity) as well as the photometric properties (i.e. isophotal shape parameter, a4) and spectroscopic parameters (e.g. the α-enhancement) of their first-ranked ellipticals are consistent with those of bright ellipticals located in non-fossil systems. This result favors a scenario where FGs are not a distinct class of systems, but rather a common phase in the life of galaxy groups. We also find no evidence for an evolutionary sequence explaining the formation of galaxies in fossil systems through the merging of galaxies in compact groups.
Type
Non-refereed

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