On the Nature of Fossil Galaxy Groups

被引：0
|
作者：
La Barbera, F. [1 ]
de Carvalho, R. R. [2 ]
de la Rosa, I. G. [3 ]
Sorrentino, G. [1 ]
Gal, R. R. [4 ]
Kohl-Moreira, J. L. [5 ]
机构：
[1] INAF OAC, Via Moiariello 16, I-80131 Naples, Italy
[2] INPE, DAS, Sao Jose Dos Campos, Brazil
[3] IAC, Tenerife, Spain
[4] Univ Hawaii IfA, Honolulu, HI 96822 USA
[5] ON, Rio De Janeiro, Brazil
来源：
GALAXIES IN ISOLATION: EXPLORING NATURE VERSUS NURTURE | 2010年 / 421卷
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D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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, a(4)) and spectroscopic parameters (e.g. the alpha-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.
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页码：225 / +
页数：2
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