AI 中文总结
研究詹姆斯·韦布空间望远镜发现的小红点，提出无尘埃物理框架，认为其贫尘埃子集是分层嵌套超大质量恒星的观测表现，阐述相关形成机制及过程，缩短了恒星组装时间尺度。
AI 中文摘要
詹姆斯·韦布空间望远镜的观测揭示了一群高红移天体——小红点。这些天体呈现光学红化及蓝色紫外连续谱，有指示活跃黑洞的宽巴尔末线且无探测到的X射线发射。早期它们的宇宙丰度超过标准爱丁顿极限增长时间尺度。现有模型借助特定尘埃几何结构来调和这些特征。我们提出一个无尘埃物理框架，评估小红点中贫尘埃子集代表分层嵌套超大质量恒星观测表现的概念。主要辐射主导包层捕获核星团，下落恒星驱动磁发电机使包层膨胀产生红色光学连续谱，未被遮挡的下落恒星产生蓝色紫外过剩，捕获的恒星碎片沉积形成高密度次级核心使X射线热化并产生宽氢α特征。中心种子在包层的全局辐射极限下吸积，动力学旁路将组装时间尺度从数亿年缩短到数千万年。
英文摘要
Observations by the James Webb Space Telescope reveal a population of high-redshift objects, the little red dots. These sources exhibit optical reddening alongside blue ultraviolet continua, host broad Balmer lines indicative of active black holes, and lack detectable x-ray emission. Their cosmic abundance at early epochs exceeds standard Eddington-limited growth timescales. Prevailing models invoke specific dust geometries to reconcile these traits. We propose a dust-free physical framework. We evaluate the concept that the dust-poor subset of little red dots represents the observational manifestation of hierarchically nested supermassive stars. A primary radiation-dominated envelope traps a nuclear star cluster. Plunging stars drive a magnetic dynamo that inflates the envelope. This produces the red optical continuum. Unobscured infalling stars yield the blue ultraviolet excess. Trapped stellar debris sediments to form a high-density secondary core within this Compton-thick host. This nested topology thermalizes x-rays and powers the broad hydrogen $α$ features. The central seed accretes at the global radiation limit of the host envelope. This kinetic bypass shortens the assembly timescale from hundreds of millions of years to tens of millions of years.
CommentsAccepted for publication ApJ Letters
