Accurate radius and mass of the transiting exoplanet OGLE-TR-132b

Details Accurate radius and mass of the transiting exoplanet OGLE-TR-132b Accurate radius and mass of the transiting exoplanet OGLE-TR-132b

2004-07-30

arxiv.org/abs/astro-ph/0407635v1

Astron.Astrophys. 424 (2004) L31-L34

Astronomy and Astrophysics

Astrophysics

accepted in A&A letters

Scientific paper

10.1051/0004-6361:200400048

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 cons trained, 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 millimagnitude 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 R_J and 1.19 +- 0.13 M_J. The refined ephemeris of OGLE-TR-132 transits is T_0 = 2453142.5888 and P = 1.689857 days.

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