Computer Science
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176...21m&link_type=abstract
In ESA 3rd European IUE Conf. p 21-29 (SEE N83-11889 02-88)
Computer Science
4
Main Sequence Stars, Stellar Evolution, Stellar Mass Ejection, Wolf-Rayet Stars, Abundance, Helium, Iue, Planetary Nebulae, Stellar Luminosity, Stellar Mass, Stellar Structure
Scientific paper
The consequences for the evolution of massive stars of mass loss in the main sequence phase, and especially the helium burning phase, are examined. Abundances determined from IUE observations are compared with the theoretically expected values. The importance of nitrogen (and neon) abundance determinations in WC stars is emphasized in relation with the possibilities of mixing in massive stars and the variety of the possible scenarios for forming WR stars. Problems concerning the abundances of CNO elements in planetary nebulae are mentioned. It is argued that different evolutionary sequences can lead from OB stars to supernova explosions, depending on initial mass and mass loss rates.
de Loore Camiel
Maeder Andre
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