Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.209...79s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 209, no. 1, p. 79-97
Astronomy and Astrophysics
Astrophysics
8
Emission Spectra, H Lines, Stellar Envelopes, Stellar Models, Symbiotic Stars, Ubv Spectra, Equipotentials, Lagrangian Equilibrium Points, Light Curve, Mass Ratios, Mathematical Models, Orbital Mechanics, Radial Velocity
Scientific paper
We present a quantitative model of a proposed common slowly expanding envelope corotating with a symbiotic binary system. The geometry of the envelope is defined by the equipotential surface containing the Lagrangian point L2. The model was applied to the symbiotic binary EG And. The orbital inclination i = 45 deg, and mass ratio of the cool to the hot component, q = 2.8-3.0, are determined. The nature of the primary as well as the secondary minima in the light curves, development of the line profiles, radial velocities and equivalent widths of the hydrogen alpha line through an orbital revolution are explained by this model.
Errico L.
Skopal Augustin
Vittone A. A.
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