美国航天局的詹姆斯·韦伯太空望远镜发现了一个位于距地球104亿光年处的古老星系团XLSSC 122，其异常密集的暗物质浓度对现有宇宙演化模型构成了重大挑战1。该星系团形成于约100亿年前的"宇宙正午"时期1，是已知距离最远展现强引力透镜效应的星系团1。研究人员利用透镜效应、星际光和多波段观测等手段，发现星系团中心的质量浓度与标准宇宙学模型的预测不符，表明该星系团在宇宙早期的发展速度超过现有理论预期1。
这项由加州理工学院IPAC等机构研究人员进行的研究取得了多个重要发现1。其中包括有史以来最早的星际光检测1，而星际光的分布与强引力透镜推断的暗物质分布相匹配1，为理解星系团结构提供了新的观测证据。相关研究论文已发表于《天体物理学期刊通讯》1。
The James Webb Space Telescope has detected a remarkably massive galaxy cluster located 10.4 billion light-years from Earth, presenting a significant challenge to current theories of how the universe evolved 1. Known as XLSSC 122 and formed approximately 10 billion years ago during what astronomers call the "cosmic noon" era, this cluster contains an unusually dense concentration of dark matter that diverges from predictions in standard cosmological models 1.
The discovery marks a particularly important milestone in observational astronomy: XLSSC 122 is the most distant galaxy cluster known to exhibit strong gravitational lensing, a phenomenon where massive objects bend light from more distant sources 1. Through analysis of this lensing effect, combined with observations of intracluster light—the scattered light from stars ejected from galaxies within the cluster—researchers have mapped the dark matter distribution with unprecedented clarity 1. The spatial distribution of intracluster light aligns with the dark matter patterns inferred from gravitational lensing, providing independent confirmation of the cluster's structure 1.
According to observations conducted by researchers from IPAC and the California Institute of Technology, the mass concentration in the cluster's center differs from what current cosmological models predict 1. This finding suggests that massive galaxy clusters developed more rapidly in the early universe than existing theoretical frameworks account for. The research team's findings, based on multi-wavelength observations including data from the James Webb Space Telescope, have been published in the Astrophysical Journal Letters 1.
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