Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....61..251d&link_type=abstract
Astronomy and Astrophysics, vol. 61, no. 2, Oct. 1977, p. 251-259.
Astronomy and Astrophysics
Astrophysics
117
Stellar Evolution, Stellar Mass Ejection, Stellar Winds, Supergiant Stars, B Stars, Binary Stars, Early Stars, Hertzsprung-Russell Diagram, O Stars, Stellar Envelopes, Stellar Luminosity, Stellar Structure
Scientific paper
Attention is given to the evolutionary sequences for massive stars of 20, 25, 30, 40, and 50 solar masses with continuous mass ejection. Calculations are made for various rates of mass loss, and the results are presented in evolution tracks, isochrones, and lines of equal mass. The major differences between evolution with mass loss and conservative evolution are: (1) the hydrogen core burning phase covers a wider strip in the Hertzsprung-Russell diagram, (2) the lines of equal mass are steeper than conservative tracks in the core burning phase, (3) the stars cross the Hertzsprung-Russell diagram nearly horizontally in the shell burning phase, even if the mass loss rate is very large, and (4) the stars are overluminous or undermassive during the shell burning phase. The results are valid for single stars in which the effect of rotation can be neglected.
de Greve Jean-Pierre
de Loore Camiel
Lamers Henny J. G. L. M.
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