AI 中文总结
本研究利用JWST PRIMER巡天中MIRI选星系，通过公民科学分类发现中红外选星系形态与光学选不同，并识别出可能遮蔽AGN的盘状星系，为形态-尘埃-恒星形成-AGN联系研究奠定基础。
AI 中文摘要
我们展示了宇宙碰撞项目视觉形态学分类的首批结果，该分类涵盖来自JWST公共释放河外研究成像（PRIMER）巡天的14,657个星系。样本由MIRI F770W探测到的星系组成，跨越了宇宙恒星形成峰值时期（1<z<3）。我们生成了静止系光学和观测系中红外图像，并通过Zooniverse平台招募公民科学志愿者对星系形态、表面特征和相互作用进行分类。该项目积累了来自超过4,700名志愿者的304,524次分类。我们发现，中红外选星系相对于光学和近红外选星系具有显著不同的形态，在z<2时倾向于富尘埃盘星系，在z>2时倾向于致密系统。这颠覆了光学选择的结果，后者显示星系随宇宙时间变得更以核球为主且更椭球。此外，我们识别出一类具有盘状光学形态和明亮中红外点源核心的星系群体，它们可能代表遮蔽的活动星系核候选体，为仅基于成像识别活动星系核提供了一条有前景的路径。与HST成像的视觉分类比较展示了JWST改进的灵敏度和分辨率对星系结构和相互作用识别的影响，先前被HST识别为致密、平滑或无特征的系统在JWST中显示出显著的延展和内部结构。这些结果为未来研究形态、尘埃结构、恒星形成和活动星系核活动之间的联系奠定了基础。
英文摘要
We present the first results of visual morphology classifications from the Cosmic Collisions project, comprising 14,657 galaxies from the JWST Public Release IMaging for Extragalactic Research (PRIMER) survey. The sample consists of galaxies detected with MIRI F770W and spans the epoch of peak cosmic star formation (1<z<3). We produce rest-frame optical and observed-frame mid-IR images and enlisted citizen science volunteers through the Zooniverse platform to classify galaxy morphology, surface features, and interactions. The project accumulated 304,524 classifications from more than 4,700 volunteers. We find that mid-IR selected galaxies have significantly different morphologies relative to optical and near-IR selected galaxies, favoring dust-rich disk galaxies at z<2 and compact systems at z>2. This inverts findings from optical selection, which shows galaxies becoming more bulge-dominated and elliptical over cosmic time. In addition, we identify a population of galaxies with disk-like optical morphologies and luminous mid-IR point-source cores that may represent obscured AGN candidates, offering a promising path to identify AGNs based on imaging alone. Comparison with visual classifications from HST imaging demonstrates the impact of JWST's improved sensitivity and resolution on the identification of galaxy structure and interactions, with systems previously identified by HST as compact, smooth, or featureless showing significant extended and internal structure in JWST. These results provide a foundation for future investigations into the connection between morphology, dust structure, star formation, and AGN activity.
Comments16 pages (19 w/ bibliography) 13 figures, 1 table. CSV of table 1 available on request (uploaded in future version)
