利用 JWST NIRSpec PRISM 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
系外行星的透射光谱已在数十颗系外行星大气中揭示了水蒸气、气溶胶和碱金属的迹象。然而，先前利用哈勃和斯皮策空间望远镜的推断受限于观测相对较窄的波长范围和光谱分辨能力，这阻碍了对其他化学物种——尤其是主要含碳分子——的明确识别。在此，我们报告了 WASP-39 b（一颗约 1200 K、大致土星质量、木星半径的系外行星）在 0.5–5.5 μm 宽波长范围内的透射光谱，该光谱由 JWST NIRSpec 的 PRISM 模式作为 JWST 凌星系外行星社区早期释放科学团队计划的一部分测得。我们以高显著性稳健探测到多种化学物种，包括 Na（19σ）、H₂O（33σ）、CO₂（28σ）和 CO（7σ）。CH₄ 的未探测到，加上强烈的 CO₂ 特征，支持具有超太阳大气金属丰度的大气模型。在 4 μm 处一个未预期的吸收特征最好由 SO₂（2.7σ）解释，其可能是大气光化学的示踪物。这些观测证明了 JWST 对丰富多样的系外行星成分和化学过程的灵敏度。
引用
@article{arxiv.2211.10487,
title = {Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM},
author = {Z. Rustamkulov and D. K. Sing and S. Mukherjee and E. M. May and J. Kirk and E. Schlawin and M. R. Line and C. Piaulet and A. L. Carter and N. E. Batalha and J. M. Goyal and M. López-Morales and J. D. Lothringer and R. J. MacDonald and S. E. Moran and K. B. Stevenson and H. R. Wakeford and N. Espinoza and J. L. Bean and N. M. Batalha and B. Benneke and Z. K. Berta-Thompson and I. J. M. Crossfield and P. Gao and L. Kreidberg and D. K. Powell and P. E. Cubillos and N. P. Gibson and J. Leconte and K. Molaverdikhani and N. K. Nikolov and V. Parmentier and P. Roy and J. Taylor and J. D. Turner and P. J. Wheatley and K. Aggarwal and E. Ahrer and M. K. Alam and L. Alderson and N. H. Allen and A. Banerjee and S. Barat and D. Barrado and J. K. Barstow and T. J. Bell and J. Blecic and J. Brande and S. Casewell and Q. Changeat and K. L. Chubb and N. Crouzet and T. Daylan and L. Decin and J. Désert and T. Mikal-Evans and A. D. Feinstein and L. Flagg and J. J. Fortney and J. Harrington and K. Heng and Y. Hong and R. Hu and N. Iro and T. Kataria and E. M. -R. Kempton and J. Krick and M. Lendl and J. Lillo-Box and A. Louca and J. Lustig-Yaeger and L. Mancini and M. Mansfield and N. J. Mayne and Y. Miguel and G. Morello and K. Ohno and E. Palle and D. J. M. Petit dit de la Roche and B. V. Rackham and M. Radica and L. Ramos-Rosado and S. Redfield and L. K. Rogers and E. L. Shkolnik and J. Southworth and J. Teske and P. Tremblin and G. S. Tucker and O. Venot and W. C. Waalkes and L. Welbanks and X. Zhang and S. Zieba},
journal= {arXiv preprint arXiv:2211.10487},
year = {2023}
}
备注
41 pages, 4 main figures, 10 extended data figures, 4 tables. Under review in Nature