Detection of [O <scp>iii</scp>]<sub>88 <i>μ</i>m</sub> in JADES-GS-z14-0 at <i>z</i> = 14.1793
Sander Schouws, R. J. Bouwens, Katherine Ormerod, Renske Smit, Hiddo Algera, Laura Sommovigo, Jacqueline Hodge, Andrea Ferrara, Pascal A. Oesch, Lucie E. Rowland, Ivana van Leeuwen, Mauro Stefanon, Thomas Herard-Demanche, Yoshinobu Fudamoto, H. J. A. Röttgering, Paul van der Werf
Abstract
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 (6.6 σ ) the [O iii ] 88 μ m 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 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>z</mml:mi> <mml:mo>=</mml:mo> <mml:mn>14.3</mml:mn> <mml:msubsup> <mml:mn>2</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.20</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.08</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> from NIRSpec by ≳180×. Moreover, the redshift is consistent with that previously determined from a tentative detection (3.6 σ ) 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) × 10 8 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 y d < 0.3 M ⊙ . Combining a previous JWST/MIRI photometric measurement of the [O iii ] λλ 4959,5007 Å and H β 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.