The secondary eclipse of the transiting exoplanet CoRoT-2b
The secondary eclipse of the transiting exoplanet CoRoT-2b
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凌日系外行星 CoRoT-2b 的二次日食
DOI：
10.1051/0004-6361/200912505
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发表时间：
2009
影响因子：
6.5
通讯作者：
F. Pont
中科院分区：
文献类型：
--
作者：
R. Alonso;T. Guillot;T. Mazeh;T. Mazeh;S. Aigrain;A. Alapini;P. Barge;A. Hatzes;F. Pont
我们提出了一个过境的系外行星CoRoT-2b的光变曲线的研究，旨在检测二次日食和测量其深度。这些数据是在CoRoT卫星首次运行140多天期间获得的。在用预白化技术过滤低频之后，我们检测到以轨道相位0.494\pm 0.006$为中心的0.0060\pm 0.0020 $%的二次日食。假设这颗行星有黑体辐射，我们估计其表面亮度温度为T_{\rmp，CoRoT} =1910^{+90}_{-100}$ K。我们提供了行星的平衡温度和重新分布因素作为未知量的反射光的函数。几何常数的上限为0.12。探测到的次级是有史以来最浅的。
We present a study of the light curve of the transiting exoplanet CoRoT-2b, aimed at detecting the secondary eclipse and measuring its depth. The data were obtained with the CoRoT satellite during its first run of more than 140 days. After filtering the low frequencies with a pre-whitening technique, we detect a $0.0060\pm0.0020$% secondary eclipse centered on the orbital phase $0.494\pm 0.006$. Assuming a black-body emission of the planet, we estimate a surface brightness temperature of $T_{\rm p,CoRoT} =1910^{+90}_{-100}$ K. We provide the planet's equilibrium temperature and re-distribution factors as a function of the unknown amount of reflected light. The upper limit for the geometric albedo is 0.12. The detected secondary is the shallowest ever found.