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Catwoman:一个用于非对称光变曲线的transit建模Python包

Catwoman: A transit modelling Python package for asymmetric light curves

Kathryn Jones, Néstor Espinoza

摘要:

当系外行星从其恒星前面经过时,它们会在恒星的光变曲线上留下凌日的印记,而到目前为止,恒星的光变曲线一直被认为是时间对称的,因为行星被模拟为一个圆形区域遮住恒星表面。然而,由于凌日行星的不同终结者区域的温度/压力和/或化学成分不同,这种特征可能是不对称的。catwoman是一个Python软件包,允许对这些不对称的凌日光变曲线进行建模,计算任何径向对称恒星临边暗化规律的光变曲线,其中行星被建模为两个半径不同的半圆,使用arXiv:1507.08285中开发的积分算法,并在catwoman构建的蝙蝠侠库中实现。

英文摘要:

When exoplanets pass in front of their stars, they imprint a transit signature on the stellar light curve which to date has been assumed to be symmetric in time, owing to the planet being modelled as a circular area occulting the stellar surface. However, this signature might be asymmetric due to different temperature/pressure and/or chemical compositions in the different terminator regions of the transiting planet. catwoman is a Python package that allows to model these asymmetric transit lightcurves, calculating lightcurves for any radially symmetric stellar limb darkening law, and where planets are modelled as two semi-circles, of different radii, using the integration algorithm developed in arXiv:1507.08285 and implemented in the batman library, from which catwoman builds upon.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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