Tau-REx（Tau Retrieval of Exoplanets）是一个全新的、完全贝叶斯大气检索代码，专为太阳系外大气定制。在Waldmann et al.（2015）中，介绍了透射光谱的情况，在这里，我们介绍了Tau-REx框架的发射光谱光谱检索。与透射光谱相比，由于需要检索完整的大气温度-压力（TP）分布，因此发射情况通常显著更简并。在目前对系外行星大气进行测量的情况下尤其如此，这些大气要么是低信噪比，要么是低光谱分辨率，或者两者兼而有之。在这里，我们提出了一种新的方法，结合现有的两种方法来模拟所述TP剖面：1）参数剖面，其中大气TP结构由几个模型参数解析近似，2）逐层方法，其中单独的大气层进行建模。这两种方法在收敛性和潜在的模型偏差方面都有明显的优点和缺点。本文提出的Tau-REx混合模型是一种新的两阶段TP剖面反演方法，它结合了解析解的鲁棒性和逐层方法的精确性。使用热木星WASP-76 b和热超级地球55 Cnc e的模拟，以及对HD 189733 b的二次日食测量的检索过程。
英文摘要：
Tau-REx (Tau Retrieval of Exoplanets) is a novel, fully Bayesian atmospheric retrieval code custom built for extrasolar atmospheres. In Waldmann et al. (2015) the transmission spectroscopic case was introduced, here we present the emission spectroscopy spectral retrieval for the Tau-REx framework. Compared to transmission spectroscopy, the emission case is often significantly more degenerate due to the need to retrieve the full atmospheric temperature-pressure (TP) profile. This is particularly true in the case of current measurements of exoplanetary atmospheres, which are either of low signal-to-noise, low spectral resolution or both. Here we present a new way of combining two existing approaches to the modelling of the said TP profile: 1) the parametric profile, where the atmospheric TP structure is analytically approximated by a few model parameters, 2) the Layer-by-Layer approach, where individual atmospheric layers are modelled. Both these approaches have distinct advantages and disadvantages in terms of convergence properties and potential model biases. The Tau-REx hybrid model presented here is a new two-stage TP profile retrieval, which combines the robustness of the analytic solution with the accuracy of the Layer-by-Layer approach. The retrieval process is demonstrated using simulations of the hot-Jupiter WASP-76b and the hot SuperEarth 55 Cnc e, as well as on the secondary eclipse measurements of HD189733b.
Pre-computed aerosol extinction, scattering and asymmetry grids for scalable atmospheric retrievals
Université Paris Cité, Université Paris-Saclay, CEA, CNRS, AIM（巴黎西岱大学、巴黎萨克雷大学、法国原子能和替代能源委员会、法国国家科学研究中心、天体物理学和分子光谱学研究所）；Kapteyn Institute, University of Groningen（卡普坦研究所、格罗宁根大学）
Ares: A Mars model retrieval framework for ExoMars Trace Gas Orbiter NOMAD solar occultation measurements
Ares是TauREx 3火星大气检索框架的扩展。战神是一个新的大气参数和前向模型的集合，为欧洲空间局（欧空局）的微量气体轨道器（TGO）天底和掩星火星发现（NOMAD）仪器，太阳掩星（SO）通道设计。战神通过应用系外行星大气检索中使用的方法，提供了对火星大气化学成分的独特见解，Waldmann et al.（2015），Al-Refaie et al.（2019）。这一发现可能有助于揭示火星上$CH_{4}$的真实性质。这里描述的是战神模型。随后，定义了战神的组成部分，包括：NOMAD SO通道仪器功能模型、火星大气分子吸收截面、几何模型和NOMAD噪声模型。Ares大气先验和正演模型，（即，模拟NOMAD观测），并与行星光谱发生器进行分析、比较和验证，Villanueva等人（2018）。
$\texttt{Exoformer}$: Accelerating Bayesian atmospheric retrievals with transformer neural networks
Università degli Studi di Padova（帕多瓦大学）；INAF, Osservatorio Astronomico di Padova（意大利国家天体物理研究所帕多瓦天文台）；Centro di Ateneo di Studi e Attività Spaziali “G. Colombo” – Università degli Studi di Padova（帕多瓦大学“G.科洛姆博”太空研究与活动中心）
Toward a multidimensional analysis of transmission spectroscopy. Part I: Computation of transmission spectra using a 1D, 2D, or 3D atmosphere structure
