Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aj....139.2347l&link_type=abstract
The Astronomical Journal, Volume 139, Issue 6, pp. 2347-2359 (2010).
Astronomy and Astrophysics
Astronomy
4
Binaries: Eclipsing, Binaries: Spectroscopic, Stars: Fundamental Parameters, Stars: Individual: Co And, Stars: Rotation, Stars: Solar-Type
Scientific paper
Accurate absolute properties have been determined for the eclipsing triple star CO And (F8+F8) based on extensive differential photometry obtained by three robotic observatories and CfA spectroscopy. The eclipsing binary star orbit is circular with a period of 3.655 days. The triple nature of this system is revealed by more than a century of timings of minimum light, and by the presence of third light in the photometric orbits. The masses of the eclipsing pair are 1.289 ± 0.007 and 1.264 ± 0.007 solar masses, and the corresponding radii are 1.727 ± 0.021 and 1.694 ± 0.017 solar radii. These stars are synchronously rotating and are near the end of their main-sequence phase, at an age of about 3.6 Gyr. The much fainter widely separated third body appears to have a mass of about 0.8 solar masses. The distance to the system is 377 ± 25 pc.
Charbonneau David
Claret Antonio
Mandushev Georgi
O'Donovan Francis T.
Sandberg Lacy Claud H.
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