论文标题
恐慌！在磁盘上：$ z> 3 $的第一个休息框架光学观察在SMACS 0723字段中使用JWST
Panic! At the Disks: First Rest-frame Optical Observations of Galaxy Structure at $z > 3$ with JWST in the SMACS 0723 Field
论文作者
论文摘要
我们提出了关于詹姆斯·韦伯（James Webb）空间望远镜在$ z> 3 $中看到的星系的形态和结构特性的早期结果，在SMACS 0723的早期版本观测中，这是一个$ z = 0.39 $的星系群。我们首次研究了大量的$ z> 3 $星系的光学形态，并在该领域具有准确的光度红移，以确定相对早期宇宙中星系结构的形式。我们使用视觉形态和\ textsc {morfometryka}测量来执行定量形态测量，既有带有光谱拟合（Sérsic索引）的参数（sérsic指数）和非参数（CAS值）。使用这些，我们以$ 3 <z <8 $的价格测量磁盘，球形和特殊星系的相对分数。我们发现令人惊讶的结果是，$ z> 1.5 $磁盘的星系占据了形态的整体部分，其中$ \ sim 10 $相对磁盘星系的数量比这些红移时哈勃太空望远镜所看到的。我们对星系的视觉形态估计与其在CAS参数空间及其Sérsic指数中的位置紧密结合。
We present early results regarding the morphological and structural properties of galaxies seen with the James Webb Space Telescope at $z > 3$ in the Early Release Observations of SMACS 0723, a galaxy cluster at $z=0.39$. We investigate, for the first time, the optical morphologies of a significant number of $z > 3$ galaxies with accurate photometric redshifts in this field to determine the form of galaxy structure in the relatively early universe. We use visual morphologies and \textsc{Morfometryka} measures to perform quantitative morphology measurements, both parametric with light profile fitting (Sérsic indices) and non-parametric (CAS values). Using these, we measure the relative fraction of disk, spheroidal, and peculiar galaxies at $3 < z < 8$. We discover the surprising result that at $z > 1.5$ disk galaxies dominate the overall fraction of morphologies, with a factor of $\sim 10$ relative higher number of disk galaxies than seen by the Hubble Space Telescope at these redshifts. Our visual morphological estimates of galaxies align closely with their locations in CAS parameter space and their Sérsic indices.
