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arXiv 1904.09355astro-ph.EP
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利用PICASO进行系外行星反射光光谱研究

Exoplanet Reflected Light Spectroscopy with PICASO

Natasha E. Batalha, Mark S. Marley, Nikole K. Lewis, Jonathan J. Fortney

摘要:

在这里,我们提出了第一个开源的辐射转移模型,用于计算在任何相位几何的系外行星的反射光,称为PICASO:大气散射观测的行星强度代码。此代码用Python编写,继承了数十年前著名的Fortran模型,该模型用于对太阳系及以外的行星物体进行多项研究。我们已经采用了它,包括几种方法来计算直接和漫散射相函数,并增加了几个更新,包括计算拉曼散射光谱特征的能力。在这里,我们基准PICASO对两个独立的代码和讨论的程度,该模型是敏感的用户的规格为各种相位功能。然后,我们在温度,云廓线,信噪比和分辨率的广泛参数空间进行了全面的信息内容的模式研究。

英文摘要:

Here we present the first open-source radiative transfer model for computing the reflected light of exoplanets at any phase geometry, called PICASO: Planetary Intensity Code for Atmospheric Scattering Observations. This code, written in Python, has heritage from a decades old, well-known Fortran model used for several studies of planetary objects within the Solar System and beyond. We have adopted it to include several methodologies for computing both direct and diffuse scattering phase functions, and have added several updates including the ability to compute Raman scattering spectral features. Here we benchmark PICASO against two independent codes and discuss the degree to which the model is sensitive to a user's specification for various phase functions. Then, we conduct a full information content study of the model across a wide parameter space in temperature, cloud profile, SNR and resolving power.

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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