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Making compact elliptical satellite galaxies: a conceptual model for M32

Published online by Cambridge University Press:  08 November 2005

John S. Gallagher ,
Eva K. Grebel  and
Linda J. Smith
John S. Gallagher
Affiliation:
Dept. Astronomy, U. Wisconsin, 475 N. Charter St. Madison, WI 53760, USA email: jsg@astro.wisc.edu
Eva K. Grebel
Affiliation:
Astronomisches Institut, Venusstrasse 7, CH-4102, Binningen, Switzerland
Linda J. Smith
Affiliation:
Dept. Physics & Astronomy, Gower St., U. College London, London WC1E 6BT, UK
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Abstract

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M32 and other compact dwarf galaxies present interesting evolutionary puzzles. Why are most dwarf galaxies low density systems while a very few, like M32, have the highest stellar densities of any galaxies? We suggest that gas capture should be added to the tidal stirring mix as a way to make high density M32-type dwarfs starting with relatively ordinary satellite galaxies. This paper presents some of the basic features and issue associated with gas capture models.

Keywords

galaxies: dwarfgalaxies: evolutiongalaxies: individual (M32, NGC 1510)galaxies: structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C198: Near-Field Cosmology with Dwarf Elliptical Galaxies , March 2005 , pp. 151 - 155
Copyright
© 2005 International Astronomical Union