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Groups of Dwarf Galaxies in the Local Supercluster

Published online by Cambridge University Press:  11 July 2011

M. Koleva ,
Ph. Prugniel ,
I. Vauglin ,
D. Makarov ,
I. Karachentsev  and
R. Uklein
D. Makarov*
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences, Russia Université de Lyon, Université Lyon 1, CNRS/IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France
I. Karachentsev
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences, Russia
R. Uklein
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences, Russia
*
e-mail: dim@sao.ru
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Abstract

We present a project on study of groups composed of dwarf galaxies only. We selected such structures using HyperLEDA and NED databases with visual inspection on SDSS images and on digital copy of POSS. The groups are characterized by size of few tens of kpc and line-of-sight velocity dispersion about 18 km s−1. Our groups similar to associations of nearby dwarfs from Tully et al. (2006). This specific population of multiple dwarf galaxies such as I Zw 18 may contain significant amount of dark matter. It is very likely that we see them at the stage just before merging of its components.

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Type
Research Article
Information
European Astronomical Society Publications Series , Volume 48: CRAL-2010 A Universe of Dwarf Galaxies , 2011 , pp. 289 - 294
Copyright
© EAS, EDP Sciences, 2011

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