HI observations of compact groups of galaxies

Details HI observations of compact groups of galaxies HI observations of compact groups of galaxies

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasa...14...48o&link_type=abstract

Publications Astronomical Society of Australia, vol. 14, no. 1, p. 48-51

Astronomy and Astrophysics

Astronomy

7

Galaxies, Interactions, Interstellar Medium, Evolution

Scientific paper

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.

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