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A Possible New Transiting Planet

S. Dreizler·P. Hauschildt·W. Kley·T. Rauch·S. L. Schuh·K. Werner·B. Wolff
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Abstract

Recently, 59 low-luminosity object transits were reported from the Optical Gravitational Lensing Experiment (OGLE). Our follow-up low-resolution spectroscopy of 16 candidates provided two objects, OGLE-TR-3 and OGLE-TR-10, which have companions with radii compatible with those of gas-giant planets. Further high-resolution spectroscopy revealed a very low velocity variation (<500m/s) of the host star OGLE-TR-3 which may be caused by its unseen companion. An analysis of the radial velocity and light curve results in M<2.5 M_jup, R<1.6 R_jup, and an orbital separation of about 5 R_sol, which makes it the planet with the shortest period known. This allows to identify the low-luminosity companion of OGLE-TR-3 as a possible new gas-giant planet. If confirmed, this makes OGLE-TR-3 together with OGLE-TR-56 the first extrasolar planets detected via their transit light curves.

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S. Dreizler, P. Hauschildt, W. Kley, T. Rauch, S. L. Schuh, K. Werner, B. Wolff. 2003-03-08. A Possible New Transiting Planet. https://doi.org/10.1051/0004-6361%3A20030281

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