Evolutionary scenarios leading massive stars to WR stars - Their mutual importance; the role of mixing

Details Evolutionary scenarios leading massive stars to WR stars - Their mutual importance; the role of mixing Evolutionary scenarios leading massive stars to WR stars - Their mutual importance; the role of mixing

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...105..149m&link_type=abstract

Astronomy and Astrophysics, vol. 105, no. 1, Jan. 1982, p. 149-158. Research supported by the Swiss National Science Foundation

Astronomy and Astrophysics

Astrophysics

87

Binary Stars, Milky Way Galaxy, Red Giant Stars, Stellar Evolution, Stellar Mass Ejection, Wolf-Rayet Stars, Abundance, Equations Of Motion, Main Sequence Stars, O Stars, Star Distribution, Stellar Models, Supergiant Stars, Turbulent Diffusion

Scientific paper

Evolutionary scenarios for the transformation of massive stars into WR stars which have been supported by observation or physically meaningful models are discussed. The scenarios have been based on physical mechanisms which lead to the formation of the bare core and calculations of when the attained evolutionary stage displays an efficient mechanism. Consideration is given to the Conti (1975), quasi-homogeneous evolution at the verge of vibrational instability, the WR as a post-red supergiant, binary evolution with mass transfer, internal mixing, meridional circulation, convection and overshoot, and mixing by turbulent diffusion scenarios. The change of metallicity of the branching ratios between the various scenarios is explored for the case of binarity, and the role of mixing is analyzed, with indications that mixing may have a more important role than mass loss in main sequence evolution of massive stars.

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