Absolute Properties of the Eclipsing Triple Star CO Andromedae: Constraints on Convective Core Overshooting
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 s...
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| Veröffentlicht in: | The Astronomical journal 2010-06, Vol.139 (6), p.2347-2359 |
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| creator | Lacy, Claud H. Sandberg Torres, Guillermo Claret, Antonio Charbonneau, David O’Donovan, Francis T Mandushev, Georgi |
| description | 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. |
| doi_str_mv | 10.1088/0004-6256/139/6/2347 |
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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. 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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. 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| subjects | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BINARY STARS MASS MOTION PHOTOMETRY ROTATION SPECTROSCOPY STARS |
| title | Absolute Properties of the Eclipsing Triple Star CO Andromedae: Constraints on Convective Core Overshooting |
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