A combined solution of the light curve and velocity curve of U Pegasi

Details A combined solution of the light curve and velocity curve of U Pegasi A combined solution of the light curve and velocity curve of U Pegasi

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988acasn..29....9z&link_type=abstract

(Acta Astronomica Sinica, vol. 29, 1988, p. 9-15) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 12, Sept. 1988, p. 2

Astronomy and Astrophysics

Astrophysics

1

Binary Stars, Light Curve, Mass Ratios, Radial Velocity, Roche Limit, Stellar Luminosity

Scientific paper

First the authors separated the velocity and light curve solutions. The mass ratio was found to be qsp = 3.0325±0.0055 and qptm = 2.804±0.022, respectively. The spectroscopic solution was based on a Roche model. With the main joint-parameter "mass ratio" fixed at q = 3.0186±0.0053 which is the weighted average of qsp and qptm, the simultaneous solution was finally found for the light and velocity curves. The absolute dimensions of U Peg are R1 = 0.75 R_sun;, M1 = 0.39 M_sun;, and R2 = 1.24 R_sun;, M2 = 1.17 M_sun;. Both components are nearly on the main sequence on the log(R)-log(M) diagram. The over-contact degree of the common envelope of U Peg is about 19%.

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