Detection of [O iii]88 μm in JADES-GS-z14-0 at z = 14.1793

Schouws, S ORCID: 0000-0001-9746-0924, Bouwens, RJ ORCID: 0000-0002-4989-2471, Ormerod, K ORCID: 0000-0003-2000-3420, Smit, R ORCID: 0000-0001-8034-7802, Algera, H ORCID: 0000-0002-4205-9567, Sommovigo, L ORCID: 0000-0002-2906-2200, Hodge, J ORCID: 0000-0001-6586-8845, Ferrara, A ORCID: 0000-0002-9400-7312, Oesch, PA ORCID: 0000-0001-5851-6649, Rowland, LE ORCID: 0009-0009-2671-4160, van Leeuwen, I ORCID: 0009-0005-6803-6805, Stefanon, M ORCID: 0000-0001-7768-5309, Herard-Demanche, T ORCID: 0000-0003-2164-7949, Fudamoto, Y ORCID: 0000-0001-7440-8832, Röttgering, H ORCID: 0000-0001-8887-2257 and van der Werf, P ORCID: 0000-0002-4389-832X (2025) Detection of [O iii]88 μm in JADES-GS-z14-0 at z = 14.1793. The Astrophysical Journal, 988 (1). ISSN 0004-637X

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Abstract

We report the first successful Atacama Large Millimeter/submillimeter Array (ALMA) follow-up observations of a secure z > 10 JWST-selected galaxy, by robustly detecting (6.6σ) the [O iii]88 μm line in JADES-GS-z14-0 (hereafter GS-z14). The ALMA detection yields a spectroscopic redshift of z = 14.1793 ± 0.0007, and increases the precision on the prior redshift measurement of
from NIRSpec by ≳180×. Moreover, the redshift is consistent with that previously determined from a tentative detection (3.6σ) of C iii]1907,1909 (z = 14.178 ± 0.013), solidifying the redshift determination via multiple line detections. We measure a line luminosity of L[O iii]88 = (2.1 ± 0.5) × 108 L⊙, placing GS-z14 at the lower end, but within the scatter of, the local L[O iii]88–star formation rate relation. No dust continuum from GS-z14 is detected, suggesting an upper limit on the dust-to-stellar mass ratio of <2 × 10−3, consistent with dust production from supernovae with a yield yd < 0.3 M⊙. Combining a previous JWST/MIRI photometric measurement of the [O iii]λλ4959,5007 Å and Hβ lines with Cloudy models, we find GS-z14 to be surprisingly metal-enriched (Z ∼ 0.05–0.2 Z⊙) a mere 300 Myr after the Big Bang. The detection of a bright oxygen line in GS-z14 thus reinforces the notion that galaxies in the early Universe undergo rapid evolution.

Item Type:	Article
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0306 Physical Chemistry (incl. Structural); Astronomy & Astrophysics; 5101 Astronomical sciences; 5107 Particle and high energy physics; 5109 Space sciences
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	American Astronomical Society
Date of acceptance:	9 March 2025
Date of first compliant Open Access:	10 July 2025
Date Deposited:	10 Jul 2025 16:06
Last Modified:	10 Jul 2025 16:15
DOI or ID number:	10.3847/1538-4357/adbf1b
URI:	https://researchonline.ljmu.ac.uk/id/eprint/26762

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