标题： squishyplanet：在JAX中建模非球形系外行星凌日 显示英文标题

标题： squishyplanet: Modeling Transits of Non-spherical Exoplanets in JAX

摘要： 尽管天文学家在分析观测数据时通常假设系外行星是完美的球体，但那些受到强烈潮汐力和/或快速自转影响的子集预计将是明显椭球形甚至三轴椭球形。 由于行星对这些力的响应部分由其内部结构决定，因此测量系外行星偏离球形对称性的程度可以提供对其组成及其周围环境的强大洞察。 这些形状变形将在行星的相位曲线和凌星光变曲线中留下印记，并导致与球形行星相比的小幅偏差（百万分之一百到几千分之一）。 直到最近，由于测光精度的限制，这些偏差在典型的实际数据集中无法被检测到。 然而，目前以及即将上线的设施（如JWST）将常规提供需要考虑更复杂模型的数据。 为此，我们介绍了squishyplanet，这是一个基于JAX的Python包，它实现了Agol等人在2020年提出的多项式边缘暗化凌星模型的扩展，适用于非球形（三轴）行星，还提供了用于建模反射和发射相位曲线的例程。 显示英文摘要

摘要： While astronomers often assume that exoplanets are perfect spheres when analyzing observations, the subset of these distant worlds that are subject to strong tidal forces and/or rapid rotations are expected to be distinctly ellipsoidal or even triaxial. Since a planet's response to these forces is determined in part by its interior structure, measurements of an exoplanet's deviations from spherical symmetry can lead to powerful insights into its composition and surrounding environment. These shape deformations will imprint themselves on a planet's phase curve and transit lightcurve and cause small (1s-100s of parts per million) deviations from their spherical-planet counterparts. Until recently, these deviations were undetectable in typical real-world datasets due to limitations in photometric precision. Now, however, current and soon-to-come-online facilities such as JWST will routinely deliver observations that warrant the consideration of more complex models. To this end we present squishyplanet, a JAX-based Python package that implements an extension of the polynomial limb-darkened transit model presented in Agol et al. 2020 to non-spherical (triaxial) planets, as well as routines for modeling reflection and emission phase curves.