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Tidal interactions and mergers in compact groups

Published online by Cambridge University Press:  01 July 2007

I. Plauchu–Frayn  and
R. Coziol
I. Plauchu–Frayn
Affiliation:
Departmento de Astronomía, Universidad de Guanajuato, Callejón Jalisco s/n, Valenciana, Guanajuato, Gto., México. email: plauchuf@astro.ugto.mx, rcoziol@astro.ugto.mx
R. Coziol
Affiliation:
Departmento de Astronomía, Universidad de Guanajuato, Callejón Jalisco s/n, Valenciana, Guanajuato, Gto., México. email: plauchuf@astro.ugto.mx, rcoziol@astro.ugto.mx
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Abstract

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Based on a NIR morphological study of 25 galaxies in eight Compact Groups (CGs), we find that the galaxies are not in equilibrium but in a process of transformation: late-type galaxies morphological change into earlier types. As much as half of the galaxies in our sample show evidence of ongoing or past mergers.We identify tidal stripping and mergers as the process responsible of this transformation. Our observations also suggest that galaxies in CGs merge more frequently under “dry” conditions (i.e. once they have lost most of their gas).

Keywords

galaxies: evolutiongalaxies: formationgalaxies: interactions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 85 - 90
Copyright
Copyright © International Astronomical Union 2008

References

Coziol, R. & Plauchu–Frayn, I. 2007, AJ 133, 2630CrossRefGoogle Scholar