论文标题
Phoenix系外行星检索算法，并使用H $^{ - } $ opacity作为超热木星的探针
The PHOENIX Exoplanet Retrieval Algorithm and Using H$^{-}$ Opacity as a Probe in Ultra-hot Jupiters
论文作者
论文摘要
现在，大气检索是分析系外行星大气观察的标准工具。这种数据驱动的方法定量比较了大气模型与观察结果，以估计大气特性及其不确定性。在本文中，我们介绍了一个新的检索包，即凤凰海系检索分析（PETRA）。佩特拉（Petra）将凤凰大气模型放在检索框架中，使我们能够将经过良好测试且广泛使用的大气模型的优势与检索算法的优势相结合。我们通过检索模拟数据来验证PETRA，该数据已知真正的大气状态。我们还表明，Petra可以成功地从先前发表的WASP-43B和HD 209458B的检索中复制结果。对于WASP-43B结果，我们表明了不同的线条列表和线轮廓处理对检索到的大气特性的影响。最后，我们描述了一种用于检索温度结构的新技术，并使用H $^{ - } $不透明度在超热木星中的$ e^{ - } $密度，使我们能够探测缺乏JWST具有大多数分子特征的气氛。
Atmospheric retrievals are now a standard tool to analyze observations of exoplanet atmospheres. This data-driven approach quantitatively compares atmospheric models to observations in order to estimate atmospheric properties and their uncertainties. In this paper, we introduce a new retrieval package, the PHOENIX Exoplanet Retrieval Analysis (PETRA). PETRA places the PHOENIX atmosphere model in a retrieval framework, allowing us to combine the strengths of a well-tested and widely-used atmosphere model with the advantages of retrieval algorithms. We validate PETRA by retrieving on simulated data for which the true atmospheric state is known. We also show that PETRA can successfully reproduce results from previously published retrievals of WASP-43b and HD 209458b. For the WASP-43b results, we show the effect that different line lists and line profile treatments have on the retrieved atmospheric properties. Lastly, we describe a novel technique for retrieving the temperature structure and $e^{-}$ density in ultra-hot Jupiters using H$^{-}$ opacity, allowing us to probe atmospheres devoid of most molecular features with JWST.
