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Wolf-Rayet nebulae - Enrichment in He and N and effective temperatures of Wolf-Rayet stars *))

Published online by Cambridge University Press:  04 August 2017

Michael R. Rosa
Michael R. Rosa*
Affiliation:
The Space Telescope-European Coordinating Facility European Southern Observatory, Karl-Schwarzschild-Str. 2 D-8046 Garching, Federal Republic of Germany1 Affiliated to the Astrophysics Division, Space Science Department, European Space Agency

Extract

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Nebulae surrounding isolated Pop I WR stars provide observational constraints on as yet poorly determined chemical surface abundances and FUV energy distributions of their central stars. An integral of the mass loss history and the chemical evolution is stored in those parts of the nebulae that have suffered only very little mixing with the ISM (cf. Kwitter 1984). Effective temperatures in the Lyman continuum region are reflected in the ionization structure of oxygen and sulfur (cf. Mathis 1982). For intrinsic problems involved refer to the papers cited above.

Type
Mass Loss from Hot Stars
Information
Symposium - International Astronomical Union , Volume 122: Circumstellar Matter , 1987 , pp. 457 - 458
Copyright
Copyright © Reidel 1987 

References

Chu, Y.-H., Treffers, C., Kwitter, K.B.: 1983, Astrophys. J. Supp., 53, 937 CrossRefGoogle Scholar
Kwitter, K.B.: 1984, Astrophys. J., 287, 840 Google Scholar
Mathis, J.S.: 1982, Astrophys. J., 261, 195 Google Scholar
Mathis, J.S.: 1985, Astrophys. J., 291, 247 Google Scholar