The Transit Light Curve Project. II. Two Transits of the Exoplanet OGLE-TR-111b
The Transit Light Curve Project. II. Two Transits of the Exoplanet OGLE-TR-111b
复制标题
交通光曲线项目。
DOI：
10.1086/509658
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
C. Fuentes
中科院分区：
文献类型：
--
作者：
J. Winn;M. Holman;C. Fuentes
作为我们正在进行的更精确地测量系外行星大小和凌日时间的努力的一部分，我们提供了对OGLE-TR-111B的两次凌日的I波段观测。该方法的准确度为0.15%~0.20%，节奏为1~2分钟。得到行星半径为Rp=1.067±0.054RJup，恒星半径为RS=0.831±0.031 R⊙。不确定度主要是测光误差，而不是由临边暗化函数或恒星质量不确定引起的系统误差。恒星半径和行星半径都与理论预期一致。凌日时间的精确度在30 S以内，并使我们能够精确地估计出平均轨道周期：4.0144479±0.0000041天。
As part of our ongoing effort to measure exoplanet sizes and transit times with greater accuracy, we present I-band observations of two transits of OGLE-TR-111b. The photometry has an accuracy of 0.15%-0.20% and a cadence of 1-2 minutes. We derive a planetary radius of RP = 1.067 ± 0.054RJup and a stellar radius of RS = 0.831 ± 0.031 R⊙. The uncertainties are dominated by errors in the photometry rather than by systematic errors arising from uncertainties in the limb-darkening function or the stellar mass. Both the stellar radius and the planetary radius are in agreement with theoretical expectations. The transit times are accurate to within 30 s and allow us to refine the estimate of the mean orbital period: 4.0144479 ± 0.0000041 days.