TrES-1: The Transiting Planet of a Bright K0 V Star

R. Alonso(NSF National Center for Atmospheric Research), Timothy M. Brown(NSF National Center for Atmospheric Research), Guillermo Torres(Harvard University), David W. Latham(Harvard University), A. Sozzetti(University of Pittsburgh), Georgi Mandushev(Lowell Observatory), Juan Antonio Belmonte(Instituto de Astrofísica de Canarias), David Charbonneau(California Institute of Technology), H. J. Deeg(Instituto de Astrofísica de Canarias), Edward W. Dunham(Lowell Observatory), Francis T. O’Donovan(California Institute of Technology), R. P. Stefanik(Harvard University)
The Astrophysical Journal
September 1, 2004
10.1086/425256
Cited by 461Open Access
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Abstract

We report the detection of a transiting Jupiter-sized planet orbiting a relatively bright (V=11.79) K0V star. We detected the transit light-curve signature in the course of the TrES multi-site transiting planet survey, and confirmed the planetary nature of the companion via multicolor photometry and precise radial velocity measurements. We designate the planet TrES-1; its inferred mass is 0.75 +/- 0.07 Jupiter masses, its radius is 1.08 (+0.18/-0.04) Jupiter radii, and its orbital period is 3.030065 +/- 0.000008 days. This planet has an orbital period similar to that of HD 209458b, but about twice as long as those of the OGLE transiting planets. Its mass is indistinguishable from that of HD 209458b, but its radius is significantly smaller and fits the theoretical models without the need for an additional source of heat deep in the atmosphere, as has been invoked by some investigators for HD 209458b.

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