凌日系外行星WASP-10b的较小半径
A Smaller Radius for the Transiting Exoplanet WASP-10b
摘要：
本文介绍了WASP-10短周期类木行星凌日期间的测光情况。我们采用了新的PSF成形能力的光学相机安装在UH 2.2米望远镜，以实现每1.3分钟的样品4.7e-4的光度精度。有了这个新的光变曲线，结合恒星演化模型，我们改进了现有的行星，恒星和轨道参数的测量。我们发现恒星半径Rstar = 0.698 +/-0.012 Rsun，行星半径Rp = 1.080 +/-0.020 Rjup。所引用的误差不包括恒星演化模型中任何可能的系统误差。我们的测量将行星半径的精度提高了4倍，并将之前的估计值向下修正了16%（2.5 sigma，其中sigma是各自置信限的正交和）。我们测量的WASP-10b的半径与先前发表的辐照木星行星的理论半径一致。
英文摘要：
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.
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