Evolution of initially mixed massive main sequence stars

Details Evolution of initially mixed massive main sequence stars Evolution of initially mixed massive main sequence stars

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...284..138w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 1, p. 138-144

Astronomy and Astrophysics

Astrophysics

11

Early Stars, Main Sequence Stars, Massive Stars, Mixing, Stellar Evolution, Stellar Models, Abundance, Helium, Homogeneity, Hydrogen, Stellar Cores

Scientific paper

The main sequence evolution of massive stars is calculated under the assumption that an unspecified mixing process were able to keep the models homogeneous during some fraction of the core hydrogen burning phase. The mixing could be due to rotation. The results are used to discuss discrepancies in stellar parameters between recent spectral analyses of OB stars and standard stellar evolution theory. The observed surface helium abundances serve as input to determine the duration of the mixing. It is shown that mixing on the main sequence alone cannot expain the derived values. although the agreement becomes much better when using the tracks presented here.

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