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Post Info TOPIC: KOI-428 b


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RE: KOI-428 b
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Title: SOPHIE velocimetry of Kepler transit candidates II. KOI-428b: a hot Jupiter transiting a subgiant F-star
Authors: A. Santerne, R. F. Diaz, F. Bouchy, M. Deleuil, C. Moutou, G. Hebrard, A. Eggenberger, D. Ehrenreich, C. Gry, S. Udry

We report the discovery of a hot Jupiter transiting a subgiant star with an orbital period of 6.87 days thanks to public photometric data from the Kepler space mission and new radial velocity observations obtained by the SOPHIE spectrograph. The planet KOI-428b with a radius of 1.17 ±0.04 RJup and a mass of 2.2 ±0.4MJup, orbits around a F5IV star with R* = 2.13 ±0.06Rsun, M* = 1.48 ±0.06 Msun and Teff = 6510 ±100 K. The star KOI-428 is the largest and the most evolved star discovered so far with a transiting planet.

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Name KOI-428 b
Discovered in2010 
M.sin i2.2 (± 0.4) MJ
Semi major axis0.08 (± 0.003) AU
Orbital period6.87349 (± 0.00064) days
Eccentricity
Radius1.17 (± 0.04) RJ
Ttransit2455005.5198 (± 0.0024)
Inclination89.7 (-0.1+0.3deg.
Update31/12/10 
Source


KOI=Kepler Object of Interest.

Title: SOPHIE velocimetry of Kepler transit candidates II. KOI-428b: a hot Jupiter transiting a subgiant F-star,
Authors: A. Santerne1, R. F. D'az, F. Bouchy, M. Deleuil1, C. Moutou1, G. H'ebrard,, A. Eggenberger, D. Ehrenreich, C. Gry, and S. Udry

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