ISM of galaxies in extremely different environments: Isolated vs compact groups

Lourdes Verdes-Montenegro, M. S. Yun, Sanchayeeta Borthakur, Daniel Espada, Ibrahimselim Sellim, E. Athanassoula, Gilles Bergond, A. Bosma, F. Combes, E. Garcia, W. K. Huchtmeier, S. Leon, Ute Lisenfeld, S. Odewahn, T. Ponman, Jesper Rasmussen, J. Sabater, J. Sulentic, Simon Verley

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We present a study of the HI, CO and FIR emission properties of galaxies in dense groups and compare with those of the reference sample of extremely isolated galaxies defined in the AMIGA project. We have previously proposed an evolutionary scenario in which the amount of HI decreases with the secular evolutionary state of a group. A key question involves the fate of the HI in stripped galaxies, and how it affects the other ISM components. In order to investigate the process leading to HI deficiency, we imaged HI in a redshift limited sample of compact groups using the VLA. Surprisingly, some of these groups show little HI emission down to a column density as low as 1019 cm-2. We find a trend for the most HI deficient groups to be also deficient in CO and FIR emission, and we propose that when HI is removed from the galaxies the molecular gas is not replenished, inhibiting future star formation activity.

Original languageEnglish (US)
Title of host publicationGroups of Galaxies in the Nearby Universe
Subtitle of host publicationProceedings of the ESO Workshop held at Santiago de Chile, December 5-9, 2005
PublisherSpringer Verlag
Number of pages6
ISBN (Print)3540711724, 9783540711728
StatePublished - 2007
Externally publishedYes

Publication series

NameESO Astrophysics Symposia
ISSN (Print)1431-2433
ISSN (Electronic)1611-6143

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Physics and Astronomy (miscellaneous)


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