TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31-Hour Orbit
Abstract
We describe the discovery of a massive transiting hot Jupiter with a very short orbital period (1.30619 d), which we name TrES-3. From spectroscopy of the host star GSC 03089-00929, we measure T_eff = 5720 +- 150 K, logg=4.6 +- 0.3, and vsini < 2 km/s, and derive a stellar mass of 0.90 +- 0.15 M_sun. We estimate a planetary mass of 1.92 +- 0.23 M_Jup, based on the sinusoidal variation of our high-precision radial velocity measurements. This variation has a period and phase consistent with our transit photometry. Our spectra show no evidence of line bisector variations that would indicate a blended eclipsing binary star. From detailed modeling of our B and z photometry of the 2.5%-deep transits, we determine a stellar radius 0.802 +- 0.046 R_sun and a planetary radius 1.295 +- 0.081 R_Jup. TrES-3 has one of the shortest orbital periods of the known transiting exoplanets, facilitating studies of orbital decay and mass loss due to evaporation, and making it an excellent target for future studies of infrared emission and reflected starlight.
Keywords
Cite
@article{arxiv.0705.2004,
title = {TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31-Hour Orbit},
author = {Francis T. O'Donovan and David Charbonneau and Gáspár Á. Bakos and Georgi Mandushev and Edward W. Dunham and Timothy M. Brown and David W. Latham and Guillermo Torres and Alessandro Sozzetti and Géza Kovács and Mark E. Everett and Nairn Baliber and Márton G. Hidas and Gilbert A. Esquerdo and Markus Rabus and Hans J. Deeg and Juan A. Belmonte and Lynne A. Hillenbrand and Robert P. Stefanik},
journal= {arXiv preprint arXiv:0705.2004},
year = {2010}
}
Comments
v1. 14 pages, 2 figures, 3 tables. Submitted to ApJL 27 April 2007. Accepted for publication in ApJL 14 May 2007