A Smaller Radius for the Transiting Exoplanet WASP-10b
Abstract
We present photometry of WASP-10 during the transit of its short-period Jovian planet. We employed the novel PSF-shaping capabilities the OPTIC camera mounted on the UH 2.2m telescope to achieve a photometric precision of 4.7e-4 per 1.3 min 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 Rstar = 0.698 +/- 0.012 Rsun and a planetary radius Rp = 1.080 +/- 0.020 Rjup. 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% (2.5sigma, where sigma 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.
Cite
@article{arxiv.0812.0029,
title = {A Smaller Radius for the Transiting Exoplanet WASP-10b},
author = {John A. Johnson and Joshua N. Winn and Nicole E. Cabrera and Joshua A. Carter},
journal= {arXiv preprint arXiv:0812.0029},
year = {2009}
}
Comments
4 pages, 2 tables, 2 figures, table 1 available upon request