We describe new ultradeep James Webb Space Telescope (JWST) NIRSpec PRISM and grating spectra for the galaxies JADES-GS-z11-0 ( zspec=11.122−0.003+0.005 ) and JADES-GS-z13-0 ( zspec=13.20−0.04+0.03 ), the most distant spectroscopically confirmed galaxy discovered in the first year of JWST observations. The extraordinary depth of these observations (75 hr and 56 hr, respectively) provides a unique opportunity to explore the redshifts, stellar properties, UV magnitudes, and slopes for these two sources. For JADES-GS-z11-0, we find evidence for multiple emission lines, including [O ii]λ λ3726, 3729 and [Ne iii]λ3869, resulting in a spectroscopic redshift we determine with 94% confidence. We present stringent upper limits on the emission-line fluxes and line equivalent widths for JADES-GS-z13-0. At this spectroscopic redshift, the Lyα break in JADES-GS-z11-0 can be fit with a damped Lyα absorber with log(NHI/cm−2)=22.42−0.120+0.093 . These results demonstrate how neutral hydrogen fraction and Lyman-damping wings may impact the recovery of spectroscopic redshifts for sources like these, providing insight into the overprediction of the photometric redshifts seen for distant galaxies observed with JWST. In addition, we analyze updated NIRCam photometry to calculate the morphological properties of these resolved sources, and find a secondary source 0.″3 south of JADES-GS-z11-0 at a similar photometric redshift, hinting at how galaxies grow through interactions in the early Universe.

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搜索 z > 处的发射线 11：阻尼 Lyα 的作用和电离光子逃逸的提示


我们描述了新的超深詹姆斯韦伯太空望远镜 （JWST） NIRSpec PRISM 和星系 JADES-GS-z11-0 （ zspec=11.122−0.003+0.005 ） 和 JADES-GS-z13-0 （ zspec=13.20−0.04+0.03 ）的光谱确认星系，这是在 JWST 观测的第一年发现的最遥远的光谱确认星系。这些观测的非凡深度（分别为 75 小时和 56 小时）为探索这两个源的红移、恒星特性、紫外线星等和斜率提供了独特的机会。对于 JADES-GS-z11-0，我们发现了多条发射线的证据，包括 [O ii]λλ3726、3729 和 [Ne iii]λ3869，从而以 94% 的置信度确定光谱红移。我们对 JADES-GS-z13-0 的发射线通量和线等效宽度提出了严格的上限。在这个光谱红移下，JADES-GS-z11-0 中的 Lyα 断裂可以用 log（NHI/cm-2）=22.42-0.120+0.093 的阻尼 Lyα 吸收器拟合。这些结果表明，中性氢馏分和莱曼阻尼翼如何影响此类来源的光谱红移恢复，从而深入了解 JWST 观测到的遥远星系所看到的光度红移的高估。此外，我们分析了更新的 NIRCam 光度法来计算这些解析源的形态特性，并在 JADES-GS-z11-0 以南以南以类似的光度红移处找到了一个次级源 0.“3，暗示了星系是如何通过早期宇宙中的相互作用生长的。