TrES-1: The Transiting Planet of a Bright K0V Star

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Posted: Tuesday, March 22, 2005

image Astrophysics, abstract

From: Timothy M. Brown [view email]
Date: Mon, 23 Aug 2004 22:18:33 GMT   (50kb)
TrES-1: The Transiting Planet of a Bright K0V Star

Authors: Roi Alonso (1), Timothy M. Brown (2), Guillermo Torres (3), David W. Latham (3), Alessandro Sozzetti (4 and 3), Georgi Mandushev (5), Juan A. Belmonte (1), David Charbonneau (3 and 6), Hans J. Deeg (1), Edward W. Dunham (5), Francis T. O'Donovan (6), Robert P. Stefanik (3) ((1) Instituto de Astrofisica de Canarias, (2) Nat'l Center for Atmos. Research, (3) Harvard- Smithsonian Center for Astrophysics, (4) U. of Pittsburgh, Dept. Physics and Astronomy, (5) Lowell Observatory, (6) California Inst. of Technology)
Comments: 15 pages, 3 figures, 2 tables. To be published in Astrophysical Journal Letters. Ascii data in this http URL
Journal-ref: Astrophys.J. 613 (2004) L153-L156

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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