Oxygen abundance determinations in OB dwarfs and supergiants

Miguel A. Urbaneja (University of Hawaii, Institute for Astronomy, USA)

OB type stars are part of a young stellar population in star-forming galaxies that is coeval with H II regions. Their optical spectra present a large number of oxygen lines, which combined with their intrinsic brightness make them excellent probes to investigate the present-day O content of their host galaxies in the local universe. I will review the techniques used for the oxygen abundance determinations in OB type stars, and discuss the limitations and open issues affecting these stellar O abundances.

Invited talk given at the meeting Mapping Oxygen in the Universe, Tenerife, Spain (14-18 May 2012)

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