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Astron. Astrophys. 335, 421-430 (1998)

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Star formation and the interstellar medium in low surface brightness galaxies

I. Oxygen abundances and abundance gradients in low surface brightness disk galaxies

W.J.G. de Blok * and J.M. van der Hulst

Kapteyn Astronomical Institute, P.O. Box 800, 9700 AV Groningen, The Netherlands (edeblok@physics.unimelb.edu.au; vdhulst@astro.rug.nl)

Received 17 July 1997 / Accepted 6 March 1998

Abstract

We present measurements of the oxygen abundances in 64 HII regions in 12 LSB galaxies. We find that oxygen abundances are low. No regions with solar abundance have been found, and most have oxygen abundances [FORMULA] to 0.1 solar. The oxygen abundance appears to be constant as a function of radius, supporting the picture of quiescently and sporadically evolving LSB galaxies.

Key words: galaxies: ISM – galaxies: abundances – galaxies: evolution – ISM: abundances – galaxies: spiral

* Present address: School of Physics, University of Melbourne, Parkville VIC 3052, Australia

Send offprint requests to: W.J.G. de Blok

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© European Southern Observatory (ESO) 1998

Online publication: June 18, 1998
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