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CNO Abundances in Magellanic Cloud OB Supergiants

Published online by Cambridge University Press:  26 May 2016

Paul A. Crowther  and
Christopher J. Evans
Paul A. Crowther
Affiliation:
Department of Physics & Astronomy, UCL, Gower Street, London WC1E 6BT, UK
Christopher J. Evans
Affiliation:
The Isaac Newton Group of Telescopes, Apartado de Correos 321, 38700, Santa Cruz de La Palma, Canary Is., Spain

Abstract

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We present CNO abundance determinations in 11 Magellanic Cloud O and early B supergiants based on physical parameters obtained from FUSE, HST/IUE and VLT spectroscopy, plus model atmospheres which allow for stellar winds and line blanketing. In all cases, nitrogen is substantially enhanced whilst carbon and generally oxygen are moderately depleted, indicative of rotationally induced mixing of unprocessed and CNO processed material at their stellar surfaces.

Type
Session 2 Rotation in Relation with Abundances and Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 215: Stellar Rotation , 2004 , pp. 218 - 219
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

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