Kepler's Optical Phase Curve of the Exoplanet HAT-P-7b
Kepler's Optical Phase Curve of the Exoplanet HAT-P-7b
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DOI：
10.1126/science.1178312
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发表时间：
2009-08-07
期刊：
影响因子：
56.9
通讯作者：
Tarter, J.
中科院分区：
文献类型：
--
作者：
Borucki, W. J.;Koch, D.;Tarter, J.
在开普勒使命的调试阶段获得了10天的光度数据，包括以前已知的巨型凌日系外行星HAT-P-7 b的数据。HAT-P-7 b的数据显示，当它绕着它的星星运行时，来自这颗行星的光会平稳地上升和下降，当这颗行星经过它的星星后面时，光通量会下降130 ± 11 ppm。我们将其解释为昼面热辐射加上行星在绕其星星运行并被遮蔽时反射光的相位变化。掩星的深度在光度精度上与探测一颗地球大小的凌日行星相似，而这正是使命的设计目标。
Ten days of photometric data were obtained during the commissioning phase of the Kepler mission, including data for the previously known giant transiting exoplanet HAT-P-7b. The data for HAT-P-7b show a smooth rise and fall of light from the planet as it orbits its star, punctuated by a drop of 130 ± 11 parts per million in flux when the planet passes behind its star. We interpret this as the phase variation of the dayside thermal emission plus reflected light from the planet as it orbits its star and is occulted. The depth of the occultation is similar in photometric precision to the detection of a transiting Earth-size planet for which the mission was designed.