The evolution of low-mass close binaries influenced by the radiation of gravitational waves and by a magnetic stellar wind

Details The evolution of low-mass close binaries influenced by the radiation of gravitational waves and by a magnetic stellar wind The evolution of low-mass close binaries influenced by the radiation of gravitational waves and by a magnetic stellar wind

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...284..719i&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 284, Sept. 15, 1984, p. 719-744.

Astronomy and Astrophysics

Astrophysics

127

Binary Stars, Gravitational Waves, Stellar Evolution, Stellar Magnetic Fields, Stellar Mass, Stellar Winds, Angular Momentum, Main Sequence Stars, Pulsars, Sunspots

Scientific paper

Numerical models are presented for the evolution of low-mass binaries. Stars with 0.79-1.25 solar mass are assumed to fill their Roche lobe, and account is taken of the loss of angular momentum (AM) by emission of gravitational waves and through a stellar magnetic wind. Three evolutionary groups are characterized; the first is dominated by the AM loss mechanisms and has periods under 15 hr; the second group has periods over 15 hr and under 2 yr and features He cores after Roche lobe filling commences; the third group has a common envelope phase and a donor star with a massive degenerate core and a deep convective envelope before filling the Roche lobe. Algol stars are typical of the second group. All scenarios eventually experience exposure of He-3 on the donor. The transfer of He-3 to a degenerate companion results in nova-like explosions on the surface of the dwarf.

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