The Transit Light Curve (TLC) Project. VI. Three Transits of the Exoplanet TrES-2
The Transit Light Curve (TLC) Project. VI. Three Transits of the Exoplanet TrES-2
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交通光曲线 (TLC) 项目。
DOI：
10.1086/519077
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Everett
中科院分区：
文献类型：
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作者：
M. Holman;J. Winn;D. Latham;F. O'Donovan;D. Charbonneau;G. Torres;A. Sozzetti;J. Fernández;M. Everett
在附近可以进行详细研究的凌日系外行星中，TrES-2是质量最大、撞击参数最大的一颗。我们介绍了TrES-2三次凌日的z波段光度测定。结合Sozzetti及其同事对主星的光谱分析，我们改进了对行星、恒星和轨道参数的估计。我们发现行星半径为Rp = 1.222±0.038 R☉，恒星半径为R - = 1.003±0.027 R☉。引用的不确定度包括由于恒星质量不确定度引起的系统误差（M - - = 0.980±0.062 M☉）。凌日的时间精度为25秒，与统一的周期一致，因此为NASA开普勒卫星的未来观测提供了基线，其视野将包括TrES-2。
Of the nearby transiting exoplanets that are amenable to detailed study, TrES-2 is both the most massive and the one with the largest impact parameter. We present z-band photometry of three transits of TrES-2. We improve on the estimates of the planetary, stellar, and orbital parameters, in conjunction with the spectroscopic analysis of the host star by Sozzetti and coworkers. We find the planetary radius to be Rp = 1.222 ± 0.038 RJup and the stellar radius to be R⋆ = 1.003 ± 0.027 R☉. The quoted uncertainties include the systematic error due to the uncertainty in the stellar mass (M⋆ = 0.980 ± 0.062 M☉). The timings of the transits have an accuracy of 25 s and are consistent with a uniform period, thus providing a baseline for future observations with the NASA Kepler satellite, whose field of view will include TrES-2.