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HI Observations of Compact Groups of Galaxies

Published online by Cambridge University Press:  05 March 2013

Tom Oosterloo  and
Angela Iovino
Tom Oosterloo
Affiliation:
ATNF, CSIRO, PO Box 76, Epping, NSW 2121, Australia; toosterl@atnf.csiro.au
Angela Iovino
Affiliation:
Osservatorio Astronomico di Brera, via Brera, 28, 20121 Milano, Italy; iovino@brera.mi.astro.it
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Abstract

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We present preliminary results from HI observations of a new sample of compact groups done with the Parkes telescope, as well as from images made with the Australia Telescope Compact Array (ATCA). These observations confirm earlier claims that a significant fraction of compact groups are deficient in HI, and hence that a significant fraction of groups of galaxies that appear compact on the sky are indeed compact systems. The ATCA observations of a very HI-poor group suggest that this group is a true compact system in an advanced stage of evolution. However, the ATCA observations also show that HI-rich groups exist that are genuinely compact.

Keywords

galaxies: interactionsgalaxies: ISMgalaxies: evolution
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 14 , Issue 1 , 1997 , pp. 48 - 51
Copyright
Copyright © Astronomical Society of Australia 1997

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