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The HI Content of Compact Groups of Galaxies

Published online by Cambridge University Press:  05 March 2013

J. B. Stevens ,
R. L. Webster ,
D. G. Barnes ,
D. J. Pisano  and
M. J. Drinkwater
J. B. Stevens*
Affiliation:
School of Physics, University of Melbourne, Melbourne VIC 3010, Australia Affiliated with Australia Telescope National Facility, Epping NSW 2121, Australia
R. L. Webster*
Affiliation:
School of Physics, University of Melbourne, Melbourne VIC 3010, Australia
D. G. Barnes
Affiliation:
School of Physics, University of Melbourne, Melbourne VIC 3010, Australia
D. J. Pisano
Affiliation:
NSF MPS Distinguished Research Fellow, Australia Telescope National Facility, Epping NSW 2121, Australia
M. J. Drinkwater
Affiliation:
Department of Physics, University of Queensland, Brisbane QLD 4072, Australia
*
EE-mail: jstevens@physics.unimelb.edu.au
FE-mail: rwebster@physics.unimelb.edu.au
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Abstract

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The HI content of Hickson Compact Groups in the southern hemisphere is measured using data from the HI Parkes All-Sky Survey (HIPASS), and dedicated observations using the narrow band filter on the Multibeam instrument on the Parkes telescope. The expected HI mass of these groups was estimated using the luminosity, diameter, and morphological types of the member galaxies, calibrated from published data. Taking careful account of non-detection limits, the results show that the compact group population that has been detected by these observations has an HI content similar to that of galaxies in the reference field sample. The upper limits for the undetected groups lie within the normal range; improvement of these limits will require a large increase in sensitivity.

Keywords

galaxies: evolutiongalaxies: interactionsmethods: observational
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 21 , Issue 3 , 2004 , pp. 318 - 333
Copyright
Copyright © Astronomical Society of Australia 2004

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