Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published July 1, 2007 | Published
Journal Article Open

TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31 Hour Orbit


We describe the discovery of a massive transiting hot Jupiter with a very short orbital period (1.30619 days), which we name TrES-3. From spectroscopy of the host star GSC 03089-00929, we measure T_(eff) = 5720 ± 150 K, log g = 4.6 ± 0.3, and v sin i < 2 km s^(-1) and derive a stellar mass of 0.90 ± 0.15 M_☉. 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_☉ 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.

Additional Information

© 2007 American Astronomical Society. Received 2007 April 27; accepted 2007 May 14; published 2007 June 14. We thank B. S. Gaudi for a useful discussion. We thank the referee for helpful comments that improved the Letter. This material is based on work supported by NASA under grants NNG04GN74G, NNG04LG89G, NNG05GI57G, NNG05GJ29G, and NNH05AB88I issued through the Origins of Solar Systems Program. We acknowledge support from the NASA Kepler mission under cooperative agreement NCC2-1390. Work by G.A. B. was supported by NASA through Hubble Fellowship Grant HSTHF- 01170.01-A. G. K. acknowledges the support of OTKA K-60750.

Attached Files

Published - ODOapjl07.pdf


Files (76.9 kB)
Name Size Download all
76.9 kB Preview Download

Additional details

August 22, 2023
October 20, 2023