Astronomy and Astrophysics – Astronomy
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.268...99d&link_type=abstract
In ESA Space Astronomy and Solar System Exploration p 99-115 (SEE N87-29374 23-88)
Astronomy and Astrophysics
Astronomy
Stars, Stellar Cores, Stellar Evolution, Stellar Mass Ejection, Stellar Structure, Convection, Nuclear Reactions, Opacity, Stellar Envelopes, Wolf-Rayet Stars
Scientific paper
The evolution of single and binary stars is discussed. The basic structure equations are outlined, and the energy transfer, opacity, equation of state, and the nuclear reactions are reviewed. The effects of the extent of the convective core and of mass loss on the evolutionary tracks are analyzed. The evolution of stars of various masses is followed, and the results are compared with observations. The evolution of massive stars with mass losses explains reasonably well the existence of Of, WN, WC, and WO stars (masses, lifetimes, chemical composition). Possibilities of close binary evolution are analyzed, and comparisons with observed systems are made. The final stage of massive binaries, the X-ray stage, is emphasized.
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