Helton Jakob M, Rieke George H, Alberts Stacey, Wu Zihao, Eisenstein Daniel J, Hainline Kevin N, Carniani Stefano, Ji Zhiyuan, Baker William M, Bhatawdekar Rachana, Bunker Andrew J, Cargile Phillip A, Charlot Stéphane, Chevallard Jacopo, D'Eugenio Francesco, Egami Eiichi, Johnson Benjamin D, Jones Gareth C, Lyu Jianwei, Maiolino Roberto, Pérez-González Pablo G, Rieke Marcia J, Robertson Brant, Saxena Aayush, Scholtz Jan, Shivaei Irene, Sun Fengwu, Tacchella Sandro, Whitler Lily, Williams Christina C, Willmer Christopher N A, Willott Chris, Witstok Joris, Zhu Yongda
Steward Observatory, University of Arizona, Tucson, AZ USA.
Center for Astrophysics, Harvard & Smithsonian, Cambridge, MA USA.
Nat Astron. 2025;9(5):729-740. doi: 10.1038/s41550-025-02503-z. Epub 2025 Mar 7.
The James Webb Space Telescope (JWST) has spectroscopically confirmed numerous galaxies at > 10. While weak rest-frame ultraviolet emission lines have only been seen in a handful of sources, the stronger rest-frame optical emission lines are highly diagnostic and accessible at mid-infrared wavelengths with the Mid-Infrared Instrument (MIRI) of JWST. We report the photometric detection of the distant spectroscopically confirmed galaxy JADES-GS-z14-0 at with MIRI at 7.7 μm. The most plausible solution for the stellar-population properties is that this galaxy contains half a billion solar masses in stars with a strong burst of star formation in the most recent few million years. For this model, at least one-third of the flux at 7.7 μm originates from the rest-frame optical emission lines Hβ and/or [O iii] 4959, 5007. The inferred properties of JADES-GS-z14-0 suggest rapid mass assembly and metal enrichment during the earliest phases of galaxy formation. This work demonstrates the unique power of mid-infrared observations in understanding galaxies at the redshift frontier.
詹姆斯·韦布空间望远镜（JWST）已通过光谱确认了众多红移大于10的星系。虽然仅在少数源中观测到了微弱的静止帧紫外线发射线，但较强的静止帧光学发射线具有很高的诊断价值，并且利用JWST的中红外仪器（MIRI）在中红外波长下可以观测到。我们报告了利用MIRI在7.7微米波段对经光谱确认的遥远星系JADES-GS-z14-0进行的光度测量。对于恒星族群特性，最合理的解释是，这个星系包含5亿个太阳质量的恒星，并且在最近几百万年里经历了强烈的恒星形成爆发。对于这个模型，7.7微米波段至少三分之一的通量源自静止帧光学发射线Hβ和/或[O iii]4959、5007。JADES-GS-z14-0的推断特性表明，在星系形成的最早阶段就发生了快速的质量聚集和金属富集。这项工作展示了中红外观测在理解红移前沿星系方面的独特能力。
