The Stellar Oxygen Abundance Gradient in M33

Details The Stellar Oxygen Abundance Gradient in M33 The Stellar Oxygen Abundance Gradient in M33

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...474l.107m&link_type=abstract

Astrophysical Journal Letters v.474, p.L107

Astronomy and Astrophysics

Astronomy

52

Stars: Abundances, Stars: Early-Type, Stars: Supergiants, Galaxies: Abundances, Galaxies: Individual Messier Number: M33

Scientific paper

We report here first results concerning stellar oxygen abundances in M33. Non-LTE model atmosphere and non-LTE line formation calculations were used to determine the oxygen abundance of B-type supergiants. By choosing stars located at different projected radial distances to the center of M33, we are able to determine the oxygen abundance gradient, for which we obtain a value of -0.16 +/- 0.06 dex kpc-1. This is the first time that the oxygen stellar abundance gradient has been determined in a spiral galaxy other than the Milky Way.

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