2008/11/29 by John Asher Johnson, John A. Johnson, Joshua N. Winn +3 · 115 citations
Physics and Astronomy · #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Exoplanet #Gas giant #Hot Jupiter #Jovian #Light curve #Orbital period #Photometry (optics) #Physics #Planet #Planetary system #RADIUS #Stars #Stellar, planetary, and galactic studies #Transit (satellite) #astro-ph
paper · pdf · doi:10.1088/0004-637x/692/2/l100
published in The Astrophysical Journal 692(2), L100-L104 (IOP Publishing) · 4 pages, 2 tables, 2 figures, table 1 available upon request
arxiv created 2008/11/29 · openalex publication_date 2009/02/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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 −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 ⋆ = 0.698 ± 0.012 R ☉ and a planetary radius R P = 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.