Roi Alonso et al. 2004 ApJ 613 L153 doi:10.1086/425256
TrES-1: The Transiting Planet of a Bright K0 V Star
FREERoi Alonso1,2, Timothy M. Brown2, Guillermo Torres3, David W. Latham3, Alessandro Sozzetti3,4, Georgi Mandushev5, Juan A. Belmonte1, David Charbonneau3,6, Hans J. Deeg1, Edward W. Dunham5, Francis T. O'Donovan6, and Robert P. Stefanik3
Show affiliationsWe report the detection of a transiting Jupiter-sized planet orbiting a relatively bright (V = 11.79) K0 V star. We detected the transit light-curve signature in the course of the TrES multisite 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 
MJup, its radius is 1.08
RJup, 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.
- Subject headings
binaries: eclipsing; planetary systems; stars: individual (GSC 02652-01324); techniques: photometric; techniques: radial velocities
- Dates
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Issue 2 (2004 October 1)
Received 2004 August 6, accepted for publication 2004 August 23
Published 2004 September 1
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TrES-1: The Transiting Planet of a Bright K0 V Star
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