Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210..641m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Oct. 1, 1984, p. 641-653. Research supported by th
Astronomy and Astrophysics
Astronomy
10
Main Sequence Stars, Mass To Light Ratios, Stellar Evolution, Stellar Mass Ejection, Stellar Models, Supermassive Stars, Molecular Weight, Nuclear Fusion, Stellar Composition, Stellar Cores, Stellar Luminosity
Scientific paper
An analytical model of a massive mass-losing star is presented and compared with evolutionary calculations. A mass-luminosity law for stars with mass-to-solar-mass ratio between 15 and 500 is given. Variation of ZAMS luminosity with X and Z is discussed. An approximate formula for the convective core mass fraction is derived and compared with evolutionary calculations. For mass loss proportional to luminosity, a relation between the total mass and convective core hydrogen mass fraction is derived and used to discuss the exposure of nuclearly processed material during the MS. The production of He during the MS is calculated for this mass loss law. Power-law form of the ZAMS luminosity law is used to derive the critical mass loss rate for stellar evolution with mass loss to occur at constant luminosity. The relative importance of mass loss and nuclear burning on the average mean molecular weight is discussed.
Falk H. J.
Mitalas R.
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