Temperate Exoplanets Observable with Ariel : an Update with New Targets from TESS

Therese Encrenaz,Athena Coustenis,Billy Edwards,Karan Molaverdikhani,Marc Ollivier,Giovanna Tinetti

crossref（2023）

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Abstract

In 2018 and 2022, we have published an analysis about the observability of temperate planets (with an equilibrium temperature of about 350-500 K) with Ariel. This presentation is an update of this analysis which aims at using new targets identified in particular from the TESS database and analysing their observability with Ariel. Using the parameters of these new targets, we give an estimate of the number of transits needed for these objects to be observed in the Tier 2 mode of the space mission, and we define the information which could be derived about their atmospheric composition. We have identified about 15 targets which could be observable with ARIEL in the Tier 2 mode, which allows an identification of the main atmospheric absorbers. This list includes a gas giant, a few big Neptunes and several super-Earths/small Neptunes. This study is a follow-up of Encrenaz et al., Exp. Astr. 46, 31 (2018) and Exp. Astr. 53, 375 (2022).

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Extraterrestrial Organic Matter

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【要点】：本文更新了2018年和2022年的分析，使用TESS数据库中新发现的目标，评估了这些温度适中行星（约350-500K平衡温度）通过ARIEL任务的观测性，并估计了观测这些对象所需的星际穿越次数以及可能获得的大气成分信息。

【方法】：通过分析TESS数据库中的新目标参数，计算了在ARIEL任务的Tier 2模式下观测这些行星所需的星际穿越次数，并定义了可能得出的大气成分信息。

【实验】：研究了约15个可能通过ARIEL的Tier 2模式观测的目标，包括一个气态巨行星、几个大型的海王星以及几个超级地球/小型海王星，具体数据集未在摘要中提及。

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