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A&A 431, 1105-1121 (2005)
DOI: 10.1051/0004-6361:20041723

Doppler follow-up of OGLE transiting companions in the Galactic bulge

F. Bouchy^{1, 2}, F. Pont^{1, 2}, C. Melo³, N. C. Santos^{4, 2}, M. Mayor², D. Queloz² and S. Udry<sup>2

1</sup>  Laboratoire d'Astrophysique de Marseille, Traverse du Siphon, BP 8, 13376 Marseille Cedex 12, France
    e-mail: Francois.Bouchy@oamp.fr
²  Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
³  European Southern Observatory, Casilla 19001, Santiago 19, Chile
⁴  Centro de Astronomia e Astrofísica da Universidade de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal

(Received 23 July 2004 / Accepted 13 October 2004 )

Abstract
Two years ago, the OGLE-III survey (Optical Gravitational Lensing Experiment) announced the detection of 54 short period multi-transiting objects in the Galactic bulge (Udalski et al. 2002a,b). Some of these objects were considered to be potential hot Jupiters. In order to determine the true nature of these objects and to characterize their actual mass, we conducted a radial velocity follow-up of 18 of the smallest transiting candidates. We describe here our procedure and report the characterization of 8 low-mass star-transiting companions, 2 grazing eclipsing binaries, 2 triple systems, 1 confirmed exoplanet (OGLE-TR-56b), 1 possible exoplanet (OGLE-TR-10b), 1 clear false positive and 3 unsolved cases. The variety of cases encountered in our follow-up covers a large part of the possible scenarios occurring in the search for planetary transits. As a by-product our program yields precise masses and radii of low mass stars.

Key words: techniques: radial velocities -- stars: binaries: eclipsing -- stars: low-mass, brown dwarfs -- stars: planetary systems

SIMBAD Objects

© ESO 2005

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