利用 JWST NIRSpec G395H 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
测量系外行星大气中碳和氧的丰度被视为揭示系外行星系统形成与演化的关键途径。获取系外行星的化学清单需要高精度观测，通常从低分辨率天基和高分辨率地基设施对单个分子的探测来推断。在此，我们报告了利用 JWST NIRSpec G395H 获得的土星质量系外行星 WASP-39b 在 3–5 μm 之间覆盖多个吸收特征的中分辨率（R∼600）透射光谱。我们的观测达到了 1.46 倍光子精度，每个光谱 bin 的平均凌星深度不确定度为 221 ppm，且系统效应的影响极小。我们探测到来自 CO₂（28.5σ）和 H₂O（21.5σ）的显著吸收，并确定 SO₂ 为 4.1 μm 处吸收的来源（4.8σ）。最佳拟合大气模型的金属丰度为太阳的 3 至 10 倍，C/O 比介于亚太阳到太阳之间。这些结果，包括 SO₂ 的探测，强调了表征系外行星大气化学的重要性，并展示了 NIRSpec G395H 作为该关键波长范围内时间序列观测的优异模式。
引用
@article{arxiv.2211.10488,
title = {Early Release Science of the Exoplanet WASP-39b with JWST NIRSpec G395H},
author = {Lili Alderson and Hannah R. Wakeford and Munazza K. Alam and Natasha E. Batalha and Joshua D. Lothringer and Jea Adams Redai and Saugata Barat and Jonathan Brande and Mario Damiano and Tansu Daylan and Néstor Espinoza and Laura Flagg and Jayesh M. Goyal and David Grant and Renyu Hu and Julie Inglis and Elspeth K. H. Lee and Thomas Mikal-Evans and Lakeisha Ramos-Rosado and Pierre-Alexis Roy and Nicole L. Wallack and Natalie M. Batalha and Jacob L. Bean and Björn Benneke and Zachory K. Berta-Thompson and Aarynn L. Carter and Quentin Changeat and Knicole D. Colón and Ian J. M. Crossfield and Jean-Michel Désert and Daniel Foreman-Mackey and Neale P. Gibson and Laura Kreidberg and Michael R. Line and Mercedes López-Morales and Karan Molaverdikhani and Sarah E. Moran and Giuseppe Morello and Julianne I. Moses and Sagnick Mukherjee and Everett Schlawin and David K. Sing and Kevin B. Stevenson and Jake Taylor and Keshav Aggarwal and Eva-Maria Ahrer and Natalie H. Allen and Joanna K. Barstow and Taylor J. Bell and Jasmina Blecic and Sarah L. Casewell and Katy L. Chubb and Nicolas Crouzet and Patricio E. Cubillos and Leen Decin and Adina D. Feinstein and Joanthan J. Fortney and Joseph Harrington and Kevin Heng and Nicolas Iro and Eliza M. -R. Kempton and James Kirk and Heather A. Knutson and Jessica Krick and Jérémy Leconte and Monika Lendl and Ryan J. MacDonald and Luigi Mancini and Megan Mansfield and Erin M. May and Nathan J. Mayne and Yamila Miguel and Nikolay K. Nikolov and Kazumasa Ohno and Enric Palle and Vivien Parmentier and Dominique J. M. Petit dit de la Roche and Caroline Piaulet and Diana Powell and Benjamin V. Rackham and Seth Redfield and Laura K. Rogers and Zafar Rustamkulov and Xianyu Tan and P. Tremblin and Shang-Min Tsai and Jake D. Turner and Miguel de Val-Borro and Olivia Venot and Luis Welbanks and Peter J. Wheatley and Xi Zhang},
journal= {arXiv preprint arXiv:2211.10488},
year = {2023}
}
备注
44 pages, 11 figures, 3 tables. Resubmitted after revision to Nature