Volume 413, Number 2, January II 2004
|Page(s)||635 - 642|
|Section||Stellar structure and evolution|
|Published online||18 December 2003|
Evaluating GAIA performances on eclipsing binaries
III. Orbits and stellar parameters for UW LMi, V432 Aur and CN Lyn
Osservatorio Astronomico di Padova, Sede di Asiago, 36012 Asiago (VI), Italy
2 Dipartimento di Astronomia dell'Università di Padova, Osservatorio Astrofisico, 36012 Asiago (VI), Italy
3 CISAS, Centro Interdipartimentale Studi ed Attività Spaziali dell'Università di Padova, Italy
4 Physics and Astronomy Department, University of Calgary, Calgary T2N 1N4, Canada
5 University of Ljubljana, Department of Physics, Jadranska 19, 1000 Ljubljana, Slovenia
6 Centre for Astronomy, Nicholaus Copernicus University, ul. Gagarina 11, 87-100 Torun, Poland
Corresponding author: U. Munari, firstname.lastname@example.org
Accepted: 26 September 2003
The orbits and physical parameters of three detached F and G-type eclipsing binaries have been derived combining Hipparcos HP photometry with 8480–8740 Å ground-based spectroscopy, simulating the photometric + spectroscopic observations that the GAIA mission will obtain. Tycho BT and VT light curves are too noisy to be modeled for the three targets, and only mean Tycho colors are retained to constrain the temperature. No previous combined photometric+spectroscopic solution exists in the literature for any of the three targets. Quite remarkably, CN Lyn turned out to be an equal-masses F5 triple system. Distances from the orbital solutions agree within the astrometric error with the Hipparcos parallaxes.
Key words: surveys: GAIA / stars: fundamental parameters / binaries: eclipsing / binaries: spectroscopic
© ESO, 2004
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