Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-25T17:22:58.565Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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 

References

Castor, J.I. & Van Blerkom, D., 1970, Astrophys. J. , 161, 485.Google Scholar
Gabriel, M. & Noels, A., 1981, Astron. Astrophys. Lett. , 94, L1.Google Scholar
Noels, A., Conti, P.S., Gabriel, M. & Vreux, J-M., 1980, Astron. Astrophys. , 92, 242.Google Scholar
Nüssbaumer, H., Schmutz, W., Smith, L.J. & Willis, A.J., 1981, Astron. Astrophys. Suppl. , in press.Google Scholar
Smith, L.F. & Kuhi, L.V., 1981, JILA Report No. 117.CrossRefGoogle Scholar
Vanbeveren, D. & Doom, C., 1980, Astron. Astrophys. , 87, 77.Google Scholar
Willis, A.J., 1981, Mon. Not. R. astr. Soc. , 198, in press.Google Scholar
Willis, A.J. & Wilson, R., 1978, Mon. Not. R. astr. Soc. , 182, 559.Google Scholar