Abstract
We have analyzed high-precision vby light curvesfor the semi-detached binary V Pup in a Roche model. They are consistent with the standard gravitational darkening coefficient for hot stars, β = 0.25, rather than the value β = 1.36 ± 0.04 derived by Kitamura and Nakamura [1] using a simpler model. We rigorously estimate the confidence intervals for the allowed gravitational darkening coefficients for a star filling its Roche lobe to be β = (−0.24, +1.29) for the 99% confidence level and β = (−0.21, +1.26) for the 67% confidence level.
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Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 82, No. 2, 2005, pp. 123–130.
Original Russian Text Copyright © 2005 by Antokhina, Seifina, Cherepashchuk.
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Antokhina, E.A., Seifina, E.V. & Cherepashchuk, A.M. Gravitational darkening coefficients of the stars in the semidetached binary V Puppis. Astron. Rep. 49, 102–108 (2005). https://doi.org/10.1134/1.1862357
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DOI: https://doi.org/10.1134/1.1862357