论文标题
在JWST ers数据中发现了一个尘土飞扬，化学成熟的伴侣$ \ sim $ 4 Starburst Galaxy
Discovery of a Dusty, Chemically Mature Companion to a z$\sim$4 Starburst Galaxy in JWST ERS Data
论文作者
论文摘要
我们向Redshift 4.225的强烈镜头Galaxy SPT0418-47（“ ring”）报告了两个伴侣资源，该源是JWST早期发行科学计划的针对性。我们确认，这些来源的红移与基于NIRSPEC频谱中检测到的H $α$的环和[C II] 158 $μ$ m线的圆环。 Using multiple spectral lines detected in JWST/NIRSpec, the rest-frame optical to infrared images from NIRCam and MIRI, and far-infrared (FIR) dust continuum detected by ALMA, we argue that the newly discovered sources are actually lensed images of the same companion galaxy, hereafter referred to as SPT0418-SE ("SE"), located within 5 kpc in the source plane of the ring.使用[C II]和Dust Continuum得出的星形形成速率的下限为17 m $ _ \ odot $/yr，而SFR $ _ \ Mathrm {Hα} $估计估计要低2倍，从而确认SE是一个尘土飞扬的灰尘遮盖的星星形成的星空。使用光学线诊断的分析表明，SE具有接近太阳元素的丰度，而环似乎具有超极性金属性O/H和N/O。我们试图通过以连续的高恒星形成效率调用恒星形成的早期发作，或者在高红移时需要修订，以调和该系统中的高金属性。我们建议SPT0418-47居住在巨大的暗物质光环中，尚未被发现。这项工作强调了JWST和ALMA数据的联合分析对早期宇宙的深刻而完整的了解的重要性。
We report the discovery of two companion sources to a strongly lensed galaxy SPT0418-47 ("ring") at redshift 4.225, targeted by the JWST Early Release Science program. We confirm that these sources are at a similar redshift as the ring based on H$α$ detected in the NIRSpec spectrum, and [C II] 158 $μ$m line from ALMA. Using multiple spectral lines detected in JWST/NIRSpec, the rest-frame optical to infrared images from NIRCam and MIRI, and far-infrared (FIR) dust continuum detected by ALMA, we argue that the newly discovered sources are actually lensed images of the same companion galaxy, hereafter referred to as SPT0418-SE ("SE"), located within 5 kpc in the source plane of the ring. The star formation rate derived using [C II] and dust continuum puts a lower limit of 17 M$_\odot$/yr, while the SFR$_\mathrm{Hα}$ is estimated to be >2 times lower, thereby confirming that SE is a heavily dust obscured star-forming galaxy. Analysis using optical strong line diagnostics suggests that SE has near solar elemental abundance, while the ring appears to have super-solar metallicity O/H and N/O. We attempt to reconcile the high metallicity in this system by invoking early onset of star formation with continuous high star forming efficiency, or that optical strong line diagnostics need revision at high redshift. We suggest that SPT0418-47 resides in a massive dark matter halo with yet to be discovered neighbors. This work highlights the importance of joint analysis of JWST and ALMA data for a deep and complete picture of the early Universe.
