Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977amsci..65..737f&link_type=abstract
American Scientist, vol. 65, Nov.-Dec. 1977, p. 737-743.
Astronomy and Astrophysics
Astrophysics
1
Astrophysics, Binary Stars, Stellar Evolution, Gravitational Effects, Pulsars, Roche Limit, Stellar Mass Ejection, Supernovae, Variable Stars, X Ray Binaries, X Ray Stars
Scientific paper
Statistical studies reveal that roughly half of all stars occur in multiple systems, usually binaries. Fundamental differences exist between the evolution of single stars and stars in binary systems. These differences are the result of an exchange of mass between the individual stars of the binary system. The general characteristics of stellar evolution are considered as a basis for an investigation of a modification of these characteristics in the case of binaries. The beginning of stellar mass exchange processes is related to an expansion of a star beyond a critical radius. If a star expands beyond its 'Roche lobe', gas at its surface will flow downhill into the potential well surrounding its companion star. Attention is given to Roche geometry, the primary star during mass loss, cataclysmic variable stars, X-ray binaries, normal accreting secondaries, and the binary pulsar.
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