HI mapping of galaxies in six Group Evolution Multiwavelength Study groups

Details HI mapping of galaxies in six Group Evolution Multiwavelength Study groups HI mapping of galaxies in six Group Evolution Multiwavelength Study groups

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.384..305k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 384, Issue 1, pp. 305-315.

Astronomy and Astrophysics

Astronomy

2

Surveys, Globular Clusters: General, Galaxies: Evolution, Galaxies: Irregular, Radio Lines: Galaxies

Scientific paper

Here, we present Australia Telescope Compact Array (ATCA) HI maps of 16 HI sources in six Group Evolution Multiwavelength Study groups that were previously observed with the Parkes telescope. The higher spatial resolution of the ATCA allows us to clearly identify the optical counterparts for the first time - most being associated with low surface brightness late-type galaxies. New integrated HI maps and velocity fields for each source are presented. We find several interacting systems; one of which contains three galaxies within a common HI envelope. Extended HI structures in the sample are more consistent with tidal effects than ram pressure stripping. We identify two HI detections with previously uncatalogued optical galaxies, and add a total of six newly identified group members to the NGC 3923, 5044 and 7144 groups.
The observations were obtained with the Australia Telescope Compact Array which is funded by the Commonwealth of Australia for operations as a National Facility managed by CSIRO.
E-mail: dforbes@swin.edu.au

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