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Astron. Astrophys. 361, 19-32 (2000)

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I observations of emission-line galaxies

J.V. Smoker 1,2, R.D. Davies 2, D.J. Axon 3 and E. Hummel 2

1 Astrophysics and Planetary Science Division, Department of Pure and Applied Physics, The Queen's University of Belfast, University Road, Belfast, BT7 1NN, UK
2 University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK
3 Department of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK

Received 3 April 2000 / Accepted 6 July 2000


We present single-dish Lovell telescope H I observations of a sample of 67 emission-line and UV-excess galaxies, of which 52 are taken from the University of Michigan (UM) catalogue. In addition, H I observations of 24 gas-rich irregular galaxies are presented. We find that emission-line galaxies are H I -rich with a median H I mass to blue luminosity ratio [FORMULA]/[FORMULA] of [FORMULA] 0.45 [FORMULA]/[FORMULA]. Within the UM galaxy sample the [FORMULA]/[FORMULA] ratio tends to increase with decreasing luminosity. Finally, it is found that the most H I -rich UM galaxies are the most metal deficient, implying that these objects are less evolved.

Key words: galaxies: compact – galaxies: fundamental parameters – galaxies: irregular – radio lines: galaxies

Send offprint requests to: J.V. Smoker (j.smoker@qub.ac.uk)

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© European Southern Observatory (ESO) 2000

Online publication: September 5, 2000