Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...109..201s&link_type=abstract
Astronomy and Astrophysics, vol. 109, no. 2, May 1982, p. 201-204.
Astronomy and Astrophysics
Astrophysics
Angular Momentum, Binary Stars, Hydrodynamic Equations, Planetary Nebulae, Radiation Pressure, Eddington Approximation, Electron Scattering, Knudsen Flow, Lagrangian Equilibrium Points, Luminosity, Mass Flow, Momentum Transfer
Scientific paper
Corrections to the angular momentum per unit mass lost through the outer Lagrange point in a close binary system are calculated including corrections due to hydrodynamics and due to the inclusion of radiation pressure. For the former the expansion method developed by Lubow and Shu (1975) and Shu et al. (1979) is followed, and it is demonstrated that no significant changes in the value of v are expected for a certain range of parameters. The effects of radiation pressure on the angular momentum per unit mass lost is evaluated in a very approximate way, taking into account the Eddington luminosity, the flux mean opacity and the opacity due to electron scattering, and assuming that the Knudsen number for radiation given by the mean free path of radiation/characteristic length is larger than unity. Radiation pressure is found to reduce somewhat the specific angular momentum.
Livio Mario
Salzman Joseph
Shaviv Giora
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