A SMALLER RADIUS FOR THE TRANSITING EXOPLANET WASP-10b
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Author(s)
Johnson, John Asher
Winn, Joshua Nathan
Cabrera, Nicole E.
Carter, Joshua Adam
Date Issued
February 2009
Journal
Astrophysical Journal. Letters
Publisher
American Astronomical Society
Citation
A Smaller Radius for the Transiting Exoplanet WASP-10b
John Asher Johnson, Joshua N. Winn, Nicole E. Cabrera, and Joshua A. Carter 2009 ApJ 692 L100-L104 doi: 10.1088/0004-637X/692/2/L100
Version
Author's final manuscript
Abstract
We present the photometry of WASP-10 during a transit of its short-period Jovian planet. We employed the novel point-spread function shaping capabilities of the Orthogonal Parallel Transfer Imaging Camera mounted on the UH 2.2 m telescope to achieve a photometric precision of 4.7 × 10[superscript –4] per 1.3 minute sample. With this new light curve, in conjunction with stellar evolutionary models, we improve on existing measurements of the planetary, stellar, and orbital parameters. We find a stellar radius R sstarf = 0.698 ± 0.012 R sun and a planetary radius RP = 1.080 ± 0.020 R Jup. The quoted errors do not include any possible systematic errors in the stellar evolutionary models. Our measurement improves the precision of the planet's radius by a factor of 4, and revises the previous estimate downward by 16% (2.5σ, where σ is the quadrature sum of the respective confidence limits). Our measured radius of WASP-10b is consistent with previously published theoretical radii for irradiated Jovian planets.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
http://dx.doi.org/10.1088/0004-637x/692/2/l100
