Astronomy and Astrophysics – Astronomy
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.2208l&link_type=abstract
American Astronomical Society, 182nd AAS Meeting, #22.08; Bulletin of the American Astronomical Society, Vol. 25, p.825
Astronomy and Astrophysics
Astronomy
Scientific paper
We have calculated an evolutionary model for beta Lyrae that matches current model constraints found by Harmanec (1990, AA 237, 91) and Hubeny and Plavec (1991, AJ 102, 1156). The initial component masses were 11.0M_&sun; and 7.35M_&sun;. The evolution has been conservative, and the system is approaching the end of mass transfer. Adopting the current mass of the loser as 4.25M_&sun;, we find that component will lose an additional 1.0M_&sun; during continuation of the present slow phase of mass transfer. We find a current mass transfer rate of 3 10(-5}M_{sun ) yr(-1) , in good agreement with the Hubeny and Plavec results of 10(-4}M_{sun ) yr(-1) from entirely different considerations. The evolutionary model predicts a current system luminosity in excellent agreement with the Hubeny and Plavec value for the sum of a main sequence 14.1M_&sun; gainer and an accretion disk. The one-dimensional evolution code overestimates the radius of the gainer. This is a reasonable result in the absence of an explicit evolutionary accretion disk model. APL received partial support from NSF.
de Greve Jean-Pierre
Linnell Peter A.
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