利用 JWST NIRISS 对系外行星 WASP-39b 的早期释放科学观测
地球与行星天体物理
2023-03-15 v1 天体物理仪器与方法
太阳与恒星天体物理
摘要
透射光谱可洞察凌星系外行星的大气性质，进而揭示其形成历史、物理与化学。然而，从透射光谱精确推断大气性质需要同时测量来自广泛化学物种的多个光谱吸收特征的强度和形状。鉴于先前观测台精度和波长覆盖的局限，这一直具有挑战性。在此，我们呈现利用 JWST 上 NIRISS 仪器的 SOSS 模式获得的土星质量系外行星 WASP-39b 的透射光谱。该光谱波长跨度为 0.6–2.8 μm，揭示了多个水吸收带、钾共振双线以及云的迹象。NIRISS-SOSS 的精度和宽波长覆盖使我们能够打破云性质与 WASP-39b 大气成分之间的模型简并，倾向于重元素增丰（“金属丰度”）为太阳值的约 10–30×、亚太阳碳氧（C/O）比，以及太阳到超太阳的钾氧（K/O）比。观测最好由波长依赖、非灰云及其对行星终晨线不均匀覆盖来解释。
引用
@article{arxiv.2211.10493,
title = {Early Release Science of the exoplanet WASP-39b with JWST NIRISS},
author = {Adina D. Feinstein and Michael Radica and Luis Welbanks and Catriona Anne Murray and Kazumasa Ohno and Louis-Philippe Coulombe and Néstor Espinoza and Jacob L. Bean and Johanna K. Teske and Björn Benneke and Michael R. Line and Zafar Rustamkulov and Arianna Saba and Angelos Tsiaras and Joanna K. Barstow and Jonathan J. Fortney and Peter Gao and Heather A. Knutson and Ryan J. MacDonald and Thomas Mikal-Evans and Benjamin V. Rackham and Jake Taylor and Vivien Parmentier and Natalie M. Batalha and Zachory K. Berta-Thompson and Aarynn L. Carter and Quentin Changeat and Leonardo A. Dos Santos and Neale P. Gibson and Jayesh M Goyal and Laura Kreidberg and Mercedes López-Morales and Joshua D Lothringer and Yamila Miguel and Karan Molaverdikhani and Sarah E. Moran and Giuseppe Morello and Sagnick Mukherjee and David K. Sing and Kevin B. Stevenson and Hannah R. Wakeford and Eva-Maria Ahrer and Munazza K. Alam and Lili Alderson and Natalie H. Allen and Natasha E. Batalha and Taylor J. Bell and Jasmina Blecic and Jonathan Brande and Claudio Caceres and S. L. Casewell and Katy L. Chubb and Ian J. M. Crossfield and Nicolas Crouzet and Patricio E. Cubillos and Leen Decin and Jean-Michel Désert and Joseph Harrington and Kevin Heng and Thomas Henning and Nicolas Iro and Eliza M. -R. Kempton and Sarah Kendrew and James Kirk and Jessica Krick and Pierre-Olivier Lagage and Monika Lendl and Luigi Mancini and Megan Mansfield and E. M. May and N. J. Mayne and Nikolay K. Nikolov and Enric Palle and Dominique J. M. Petit dit de la Roche and Caroline Piaulet and Diana Powell and Seth Redfield and Laura K. Rogers and Michael T. Roman and Pierre-Alexis Roy and Matthew C. Nixon and Everett Schlawin and Xianyu Tan and P. Tremblin and Jake D. Turner and Olivia Venot and William C. Waalkes and Peter J. Wheatley and Xi Zhang},
journal= {arXiv preprint arXiv:2211.10493},
year = {2023}
}
备注
48 pages, 12 figures, 2 tables. Under review at Nature