An Updated Study of Potential Targets for Ariel

被引：85

作者：

Edwards, Billy ^{[1
]}

Mugnai, Lorenzo ^{[2
]}

Tinetti, Giovanna ^{[1
]}

Pascale, Enzo ^{[2
,3
]}

Sarkar, Subhajit ^{[3
]}

机构：

[1] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[2] Univ Roma La Sapienza, Dipartimento Fis, Piazzale Aldo Moro 2, I-00185 Rome, Italy

[3] Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales

来源：

ASTRONOMICAL JOURNAL | 2019年 / 157卷 / 06期

关键词：

planets and satellites: atmospheres; techniques: spectroscopic; PLANETS; EXOPLANETS; STAR;

D O I：

10.3847/1538-3881/ab1cb9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Ariel has been selected as ESA's M4 mission for launch in 2028 and is designed for the characterization of a large and diverse population of exoplanetary atmospheres to provide insights into planetary formation and evolution within our Galaxy. Here we present a study of Ariel' s capability to observe currently known exoplanets and predicted Transiting Exoplanet Survey Satellite (TESS) discoveries. We use the Ariel radiometric model (ArielRad) to simulate the instrument performance and find that similar to 2000 of these planets have atmospheric signals which could be characterized by Ariel. This list of potential planets contains a diverse range of planetary and stellar parameters. From these we select an example mission reference sample (MRS), comprised of 1000 diverse planets to be completed within the primary mission life, which is consistent with previous studies. We also explore the mission capability to perform an in-depth survey into the atmospheres of smaller planets, which may be enriched or secondary. Earth-sized planets and super-Earths with atmospheres heavier than H/He will be more challenging to observe spectroscopically. However, by studying the time required to observe similar to 110 Earth-sized/super-Earths, we find that Ariel could have substantial capability for providing in-depth observations of smaller planets. Trade-offs between the number and type of planets observed will form a key part of the selection process and this list of planets will continually evolve with new exoplanet discoveries replacing predicted detections. The Ariel target list will be constantly updated and the MRS re-selected to ensure maximum diversity in the population of planets studied during the primary mission life.

引用

页数：17

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