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<p>The James Webb Space Telescope (JWST) has spectroscopically confirmed numerous galaxies at <i>z</i> &gt; 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 <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41550_2025_2503_Article_IEq1.gif" Format="GIF" Height="22" Rendition="HTML" Resolution="72" Type="Linedraw" Width="99" /> </InlineMediaObject> <EquationSource Format="TEX">\(z=14.3{2}_{-0.20}^{+0.08}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>z</mi> <mo>=</mo> <mn>14.3</mn> <msubsup> <mrow> <mn>2</mn> </mrow> <mrow> <mo>−</mo> <mn>0.20</mn> </mrow> <mrow> <mo>+</mo> <mn>0.08</mn> </mrow> </msubsup> </mrow> </math></EquationSource> </InlineEquation> 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 <span>iii</span>]<i>λ</i><i>λ</i>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.</p>

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Photometric detection at 7.7 μm of a galaxy beyond redshift 14 with JWST/MIRI

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月7日

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  • Jakob M. Helton,
  • George H. Rieke,
  • Stacey Alberts,
  • Zihao Wu,
  • Daniel J. Eisenstein,
  • Kevin N. Hainline,
  • Stefano Carniani,
  • Zhiyuan Ji,
  • William M. Baker,
  • Rachana Bhatawdekar,
  • Andrew J. Bunker,
  • Phillip A. Cargile,
  • Stéphane Charlot,
  • Jacopo Chevallard,
  • Francesco D’Eugenio,
  • Eiichi Egami,
  • Benjamin D. Johnson,
  • Gareth C. Jones,
  • Jianwei Lyu,
  • Roberto Maiolino,
  • Pablo G. Pérez-González,
  • Marcia J. Rieke,
  • Brant Robertson,
  • Aayush Saxena,
  • Jan Scholtz,
  • Irene Shivaei,
  • Fengwu Sun,
  • Sandro Tacchella,
  • Lily Whitler,
  • Christina C. Williams,
  • Christopher N. A. Willmer,
  • Chris Willott,
  • Joris Witstok,
  • Yongda Zhu

摘要

The James Webb Space Telescope (JWST) has spectroscopically confirmed numerous galaxies at z > 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 \(z=14.3{2}_{-0.20}^{+0.08}\) z = 14.3 2 − 0.20 + 0.08 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]λλ4959, 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.