A transiting extrasolar giant planet around the star OGLE-TR-10

Details A transiting extrasolar giant planet around the star OGLE-TR-10 A transiting extrasolar giant planet around the star OGLE-TR-10

2004-12-16

arxiv.org/abs/astro-ph/0412400v2

Astrophys.J. 624 (2005) 372-377

Astronomy and Astrophysics

Astrophysics

accepted to Astrophysical Journal

Scientific paper

10.1086/429127

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 towards the Galactic center (Udalski et al, 2002a). We observed OGLE-TR-10 spectroscopically over a period of two years (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 et al (2004a) as a possible planet. Additionally, 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+/-0.12 MJup and a radius of 1.24+/-0.09 RJup. These parameters bear close resemblance to those of the first known transiting extrasolar planet, HD 209458b.

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