Kaluzny, J; Thompson, Ian; Rozyczka, M; Dotter, Aaron; Krzeminski, W; Pych, W; Rucinski, S M; Burley, G S; Shectman, Stephen
We use photometric and spectroscopic observations of the eclipsing binaries V65, V66, and V69 in the field of the globular cluster M4 to derive masses, radii, and luminosities of their components. The orbital periods of these systems are 2.29, 8.11, and 48.19 days, respectively. The measured masses of the primary and secondary components (Mp and Ms ) are 0.8035 ± 0.0086 and 0.6050 ± 0.0044 M⊙ for V65, 0.7842 ± 0.0045 and 0.7443 ± 0.0042 M⊙ for V66, and 0.7665 ± 0.0053 and 0.7278 ± 0/0048 M⊙ for...[Show more]
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