论文标题
Glass-JWST的早期结果。 XII：在电离时期星系的形态
Early Results From GLASS-JWST. XII: The Morphology of Galaxies at the Epoch of Reionization
论文作者
论文摘要
恒星形成星系可以在远处和光学上表现出很大的形态学差异，从而反映出恒星形成和尘埃衰减的不均匀性。我们利用了深度，高分辨率的Nircam 7波段观测值，以首先了解电离时代的星系形态（$ z> 7 $），以及其在Lyman $α$ and6000-4000Å，$ z = 7-12 $之间的剩余波长范围内的变化。我们发现没有波长的形态学变化 - 这种形态会颠覆我们从哈勃太空望远镜中学到的任何东西。使用标准定量形态统计数据，未检测到形态和波长之间的显着趋势。我们检测到4/19星系中的合并/相互作用的特征。我们的结果与莱曼破裂星系（宇宙只有400-800 myrs old时观察到）的情况是一致的，该场景通过快速的星系尺度恒星形成的结合而生长，并通过恒星形成团块和相互作用的增值来补充。
Star-forming galaxies can exhibit strong morphological differences between the rest-frame far-UV and optical, reflecting inhomogeneities in star-formation and dust attenuation. We exploit deep, high resolution NIRCAM 7-band observations to take a first look at the morphology of galaxies in the epoch of reionization ($z>7$), and its variation in the rest-frame wavelength range between Lyman $α$ and 6000-4000Å, at $z=7-12$. We find no dramatic variations in morphology with wavelength -- of the kind that would have overturned anything we have learned from the Hubble Space Telescope. No significant trends between morphology and wavelengths are detected using standard quantitative morphology statistics. We detect signatures of mergers/interactions in 4/19 galaxies. Our results are consistent with a scenario in which Lyman Break galaxies -- observed when the universe is only 400-800 Myrs old - are growing via a combination of rapid galaxy-scale star formation supplemented by accretion of star forming clumps and interactions.
