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The C/N Ratio in WN and WC Stars

Published online by Cambridge University Press:  14 August 2015

Linda J. Smith  and
Allan J. Willis
Linda J. Smith
Affiliation:
Department of Physics and Astronomy University College London Gower St., London WC1E 6BT, England
Allan J. Willis
Affiliation:
Department of Physics and Astronomy University College London Gower St., London WC1E 6BT, England

Extract

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We present new determinations of the C/He, N/He and C/N ratios in 6 WN and 4 WC stars, resulting from a Sobolev analysis of new IUE UV line measurements in these species. Through improved observations of more stars, the present work extends an earlier, UV-based, study carried out by Willis & Wilson (1978, WW), which gives details of the Escape Probability Modelling (EPM) utilised. Full details of the current IUE observations, measurements and modelling will appear in Monthly Notices: here we summarise the results. Table 1 lists the ten WR stars currently studied — all were observed at low resolution and the brightest eight at high resolution.

Type
SESSION 2 — THE CHEMISTRY OF THE WOLF-RAYET STARS
Information
Symposium - International Astronomical Union , Volume 99: Wolf-Rayet Stars: Observations, Physics, Evolution , 1982 , pp. 113 - 116
Copyright
Copyright © Reidel 1982 

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