The Chemical Composition of the Wolf-Rayet Envelopes
Model-independent information on the chemical composition of WR stars is obtained from the lines of different ions arising at transitions between highly excited energy levels. The chemical composition of WR stars strongly differs from the mean cosmic composition. Nuclear processed CNO products of H-...
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| Veröffentlicht in: | Symposium - International Astronomical Union 1991, Vol.145, p.209-220 |
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| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Model-independent information on the chemical composition of WR stars is obtained from the lines of different ions arising at transitions between highly excited energy levels.
The chemical composition of WR stars strongly differs from the mean cosmic composition. Nuclear processed CNO products of H-burning are revealed in WN envelopes and He-burning products in WC envelopes. The matter enriched with He and N is also present in some ring nebulae around WN stars. |
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| ISSN: | 0074-1809 |
| DOI: | 10.1017/S0074180900227381 |