Letter to the Editor
Accurate radius and mass of the transiting exoplanet OGLE-TR-132b*
LAM, Traverse du Siphon, BP8, Les Trois Lucs, 13376 Marseille Cedex 12, France e-mail: Claire.Moutou@oamp.fr
2 Observatoire de Genève, 51 Chemin des Maillettes,1290 Sauverny, Switzerland
Accepted: 1 August 2004
The exoplanet OGLE-TR-132b belongs to the new class of very hot giant planets, together with OGLE-TR-56b and OGLE-TR-113b, detected by their transits. Recently, radial velocity measurements provided a planetary mass estimate for OGLE-TR-132b. The planet parameters, however, were poorly constrained, because of the very shallow transit in the OGLE light curve. In this letter, based on new VLT/FORS2 photometric follow-up of OGLE-TR-132 of unprecedented quality (1.2 mmag relative photometry), we confirm the planetary nature of the orbiting object, and we derive an accurate measurement of its radius and mass: 1.13 ± 0.08 RJ and 1.19 ± 0.13 MJ. The refined ephemeris of OGLE-TR-132 transits is 2 453 142.5888 and 1.689857 days.
Key words: planetary systems / stars: individual: OGLE-TR-132
© ESO, 2004