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arXiv 2409.20549astro-ph.GA
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在红移 z=14.1793 的 JADES-GS-z14-0 中探测到 [OIII]88μm

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

Sander Schouws, Rychard J. Bouwens, Katherine Ormerod, Renske Smit, Hiddo Algera, Laura Sommovigo, Jacqueline Hodge, Andrea Ferrara, Pascal A. Oesch, Lucie E. R… 展开作者

Sander Schouws, Rychard 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, Huub Röttgering, Paul van der Werf

AI总结:

研究利用 ALMA 在 z=14.1793 的 JADES-GS-z14-0 中稳健探测 [OIII]88μm,精确测定红移,并结合 Cloudy 模型揭示其在大爆炸后3亿年已快速金属增丰。

摘要:

我们报告了对一个可靠的 z>10、由 JWST 选出的星系的首次成功 ALMA 后续观测:在 JADES-GS-z14-0(以下简称 GS-z14)中以 6.6σ 稳健探测到 [OIII]88μm 谱线。ALMA 探测给出光谱红移 z=14.1793±0.0007,使此前 NIRSpec 测得的 z=14.32_{-0.20}^{+0.08} 红移精度提高了约180倍以上。此外,该红移与此前由 CIII]1907,1909 的 3.6σ 暂定探测确定的红移(z=14.178±0.013)一致,通过多条谱线探测巩固了红移测定。我们测得谱线光度 L_[OIII]88=(2.1±0.5)×10^8 L⊙,使 GS-z14 位于局域 L_[OIII]88—恒星形成率关系的低端,但仍处于其弥散范围内。未探测到来自 GS-z14 的尘埃连续谱,表明尘埃与恒星质量比的上限为 <2×10^-3,这与产率 y_d<0.3 M⊙ 的超新星尘埃产生相符。将此前 JWST/MIRI 对 [OIII]λλ4959,5007 Å 和 Hβ 谱线的光度测量与 Cloudy 模型相结合,我们发现 GS-z14 在大爆炸后仅300 Myr 就具有令人惊讶的金属增丰程度(Z∼0.05–0.2 Z⊙)。因此,在 GS-z14 中探测到明亮的氧谱线强化了这样一种观点:早期宇宙中的星系经历了快速演化。

英文摘要:

We report the first successful ALMA follow-up observations of a secure $z > 10$ JWST-selected galaxy, by robustly detecting ($6.6σ$) the [OIII]$_{88μm}\,$ line in JADES-GS-z14-0 (hereafter GS-z14). The ALMA detection yields a spectroscopic redshift of $z=14.1793\pm0.0007$, 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 ($3.6σ$) of CIII]$_{1907,1909}$ ($z=14.178\pm0.013$), solidifying the redshift determination via multiple line detections. We measure a line luminosity of $L_\mathrm{[OIII]88} = (2.1 \pm 0.5)\times10^8\,L_\odot$, 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 $y_d < 0.3\,M_\odot$. Combining a previous JWST/MIRI photometric measurement of the [OIII]$λλ$4959,5007$\mathrm{\mathring{A}}$ and H$β$ lines with Cloudy models, we find GS-z14 to be surprisingly metal-enriched ($Z\sim0.05 - 0.2\,Z_\odot$) 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.

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