Evaluating GAIA performances on eclipsing binaries

Free access article

Issue		A&A Volume 413, Number 2, January II 2004


Page(s)		635 - 642
Section		Stellar atmospheres
DOI		http://dx.doi.org/10.1051/0004-6361:20031544

A&A 413, 635-642 (2004)
DOI: 10.1051/0004-6361:20031544

III. Orbits and stellar parameters for UW LMi, V432 Aur and CN Lyn

P. M. Marrese^{1, 2}, U. Munari^{1, 3}, A. Siviero², E. F. Milone⁴, T. Zwitter⁵, T. Tomov⁶, F. Boschi¹ and C. Boeche¹

¹ 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

(Received 12 May 2003 / Accepted 26 September 2003 )

Abstract
The orbits and physical parameters of three detached F and G-type eclipsing binaries have been derived combining Hipparcos $H_{\rm P}$ photometry with 8480-8740 Å ground-based spectroscopy, simulating the photometric + spectroscopic observations that the GAIA mission will obtain. Tycho $B_{\rm T}$ and $V_{\rm T}$ 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

Offprint request: U. Munari, munari@pd.astro.it

SIMBAD Objects in preparation

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