Detection of [OIII]88$\mu$m in JADES-GS-z14-0 at z=14.1793

Abstract

We report the first successful ALMA follow-up observations of a secure $z>10$ JWST-selected galaxy, by robustly detecting ($6.6\sigma$) the [OIII]${}_{88\mu m}$ line in JADES-GS-z14-0 (hereafter GS-z14). The ALMA detection yields a spectroscopic redshift of $z=14.1793\pm 0.0007$, and increases the precision on the prior redshift measurement of $z=14.32_{-0.20}^{+0.08}$ from NIRSpec by $\gtrsim$180$\times$. Moreover, the redshift is consistent with that previously determined from a tentative detection ($3.6\sigma$) of CIII]${}_{1907,1909}$ ($z=14.178\pm 0.013$), solidifying the redshift determination via multiple line detections. We measure a line luminosity of $L_{[\mathrm{OIII}]88}=(2.1\pm 0.5)\times 10^8{L}_{\odot }$, placing GS-z14 at the lower end, but within the scatter of, the local $L_{[\mathrm{OIII}]88}$-star formation rate relation. No dust continuum from GS-z14 is detected, suggesting an upper limit on the dust-to-stellar mass ratio of $<2\times 10^{-3}$, consistent with dust production from supernovae with a yield $y_d<0.3M_{\odot }$. Combining a previous JWST/MIRI photometric measurement of the [OIII]$\lambda \lambda$4959,5007$\mathring{\mathrm{A}}$ and H$\beta$ lines with Cloudy models, we find GS-z14 to be surprisingly metal-enriched ($Z\sim 0.05-0.2Z_{\odot }$) a mere $300\mathrm{Myr}$ 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.

11 Pages, 6 Figures, 1 Table. Accepted for publication in The Astrophysical Journal