Journal
ASTROPHYSICAL JOURNAL
Volume 624, Issue 1, Pages 372-377Publisher
IOP PUBLISHING LTD
DOI: 10.1086/429127
Keywords
line : profiles; planetary systems; stars : evolution; stars : individual (OGLE-TR-10); techniques : radial velocities
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We report a transiting extrasolar giant planet around the star OGLE-TR-10 (orbital period = 3.1 days), which was uncovered as a candidate by the OGLE team in their photometric survey toward the Galactic center. We observed OGLE-TR- 10 spectroscopically over a period of 2 yr ( 2002 - 2004), using the HIRES instrument with an iodine cell on the Keck I telescope, and measured small radial velocity variations that are consistent with the presence of a planetary companion. This confirms the earlier identification of OGLE-TR- 10b by our team and also recently by Bouchy and coworkers as a possible planet. In addition, in this paper we are able to rule out a blend scenario as an alternative explanation. From an analysis combining all available radial velocity measurements with the OGLE light curve, we find that OGLE-TR- 10b has a mass of 0.57 +/- 0.12M(J) and a radius of 1.24 +/- 0.09R(J). These parameters bear close resemblance to those of the first known transiting extrasolar planet, HD 209458b.
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