Prospects for the Characterization and Confirmation of Transiting Exoplanets via the Rossiter-McLaughlin Effect
Prospects for the Characterization and Confirmation of Transiting Exoplanets via the Rossiter-McLaughlin Effect
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通过罗西特-麦克劳克林效应表征和确认凌日系外行星的前景
DOI：
10.1086/509910
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Winn
中科院分区：
文献类型：
--
作者：
B. Gaudi;J. Winn
罗斯特-麦克劳克林效应（英语：Rossiter-McLaughlin）是恒星光谱线在日食或凌日时因恒星自转而产生的扭曲现象。我们评估了未来的前景，使用RM效应来测量行星轨道与其母星的自旋轴对齐，并确认系外行星凌日。我们计算可实现的精度的参数的兴趣，一般情况下，并为五个已知的情况下，过境系外行星与明亮的宿主恒星。我们确定的要求检测的差异旋转的影响。对于质量小或周期长的凌日行星（即将进行的卫星任务将探测到），RM效应产生的速度异常可能比星星的轨道速度大得多。对于开普勒使命发现的类日星星的可居住带中的类地行星来说，使用RM效应来确认凌日是困难的，但它仍然可能比测量光谱轨道更容易。
The Rossiter-McLaughlin (RM) effect is the distortion of stellar spectral lines that occurs during eclipses or transits, due to stellar rotation. We assess the future prospects for using the RM effect to measure the alignment of planetary orbits with the spin axes of their parent stars, and to confirm exoplanetary transits. We compute the achievable accuracy for the parameters of interest, in general and for the five known cases of transiting exoplanets with bright host stars. We determine the requirements for detecting the effects of differential rotation. For transiting planets with small masses or long periods (as will be detected by forthcoming satellite missions), the velocity anomaly produced by the RM effect can be much larger than the orbital velocity of the star. For a terrestrial planet in the habitable zone of a Sunlike star found by the Kepler mission, it will be difficult to use the RM effect to confirm transits with current instruments, but it still may be easier than measuring the spectroscopic orbit.