Thompson, Ian; Kaluzny, J; Rucinski, S M; Krzeminski, W; Pych, W; Dotter, Aaron; Burley, G S
We use photometric and spectroscopic observations of the eclipsing binary V69-47 Tuc to derive the masses, radii, and luminosities of the component stars. Based on measured systemic velocity, distance, and proper motion, the system is a member of the globular cluster 47 Tuc. The system has an orbital period of 29.5d and the orbit is slightly eccentric with e = 0.056. We obtain Mp = 0.8762 ± 0.0048 M⊙, Rp = 1.3148 ± 0.0051 R, Lp = 1.94 ± 0.21 L for the primary and Ms = 0.8588 0.0060 M, Rs =...[Show more]
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