Title: JWST reveals a high fraction of disk breaks at $1\leq z\leq 3$ Show Chinese title

Title: JWST揭示了在$1\leq z\leq 3$处高比例的盘中断

Abstract: We analyzed the deconvolved surface brightness profiles of 247 massive and angularly large disk galaxies at $1\leq z\leq 3$ to study high-redshift disk breaks, using F356W-band images from the Cosmic Evolution Early Release Science survey (CEERS). We found that 12.6% of these galaxies exhibit type I (exponential) profiles, 56.7% exhibit type II (down-bending) profiles, and 34.8% exhibit type III (up-bending) profiles. Moreover, we showed that galaxies that are more massive, centrally concentrated, or redder, tend to show fewer type II and more type III breaks. These fractions and the detected dependencies on galaxy properties are in good agreement with those observed in the Local Universe. In particular, the ratio of the type II disk break radius to the bar radius in barred galaxies typically peaks at a value of 2.25, perhaps due to bar-induced radial migration. However, the timescale for secular evolution may be too lengthy to explain the observed breaks at such high redshifts. Instead, violent disk instabilities may be responsible, where spiral arms and clumps torque fling out the material, leading to the formation of outer exponential disks. Our results provide further evidence for the assertion that the Hubble Sequence was already in place during these early periods. Show Chinese abstract

Abstract: 我们分析了247个大质量且角尺寸较大的盘星系在$1\leq z\leq 3$的去卷积表面亮度剖面，以研究高红移盘状断裂，使用来自宇宙演化早期发布科学调查（CEERS）的F356W波段图像。 我们发现这些星系中有12.6%表现出类型I（指数型）剖面，56.7%表现出类型II（向下弯曲）剖面，34.8%表现出类型III（向上弯曲）剖面。 此外，我们表明更高质量、中心集中或更红的星系倾向于表现出较少的类型II和更多的类型III断裂。 这些比例以及与星系性质的检测依赖关系与本地宇宙中观察到的结果一致。 特别是，在有棒结构的星系中，类型II盘状断裂半径与棒半径的比率通常在2.25处达到峰值，这可能是由于棒引起的径向迁移所致。 然而，恒星演化的时间尺度可能太长，无法解释如此高红移处观测到的断裂。 相反，剧烈的盘不稳定性可能是原因，其中螺旋臂和团块的扭矩将物质甩出，导致外层指数盘的形成。 我们的结果为哈勃序列在这些早期时期已经存在的断言提供了进一步的证据。