LUNA：一种产生动态行星-月球凌日的算法
LUNA: An algorithm for generating dynamic planet-moon transits
摘要：
以前的研究表明，开普勒任务可以探测到太阳系外行星的卫星，其质量超过地球质量的0.2倍。过境的时间效应已被确定为一个有效的工具，为此目的，利用系统的动态。在这项工作中，我们探索的凌日光变曲线的一颗行星加上一个月亮，不仅包括凌日的时间效应，但也光变曲线信号的月球本身的模拟。我们介绍了我们的新算法，月球，它产生过境光变曲线的两个机构，分析占阴影重叠，恒星临边变暗和行星月球动力学运动。通过将动力学构建到LUNA的核心中，该例程不仅自动考虑了行星的过境时间/持续时间变化和入口/出口不对称性，而且还考虑了月球。然后，我们生成一些人工数据的两个可行的可检测的假设系统的利益：一个i）的木星和ii）逆行类地卫星周围的可居住区海王星的M-矮星系统。我们使用LUNA拟合假设的系统，并证明了用开普勒测光检测这些情况的可行性。
英文摘要：
It has been previously shown that moons of extrasolar planets may be detectable with the Kepler Mission, for moon masses above ~0.2 Earth masses Kipping et al. 2009c. Transit timing effects have been formerly identified as a potent tool to this end, exploiting the dynamics of the system. In this work, we explore the simulation of transit light curves of a planet plus a single moon including not only the transit timing effects but also the light curve signal of the moon itself. We introduce our new algorithm, LUNA, which produces transit light curves for both bodies, analytically accounting for shadow overlaps, stellar limb darkening and planet-moon dynamical motion. By building the dynamics into the core of LUNA, the routine automatically accounts for transit timing/duration variations and ingress/egress asymmetries for not only the planet, but also the moon. We then generate some artificial data for two feasibly detectable hypothetical systems of interest: a i) prograde and ii) retrograde Earth-like moon around a habitable-zone Neptune for a M-dwarf system. We fit the hypothetical systems using LUNA and demonstrate the feasibility of detecting these cases with Kepler photometry.
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