AI 中文总结
该研究指出SKA将凭借高灵敏度等能力变革星系团引力透镜研究，通过三个科学目标揭示暗物质、星系团介质及暗弱星系，成为研究结构形成与星系演化的有力探针。
AI 中文摘要
星系团是强大的引力透镜，为研究暗物质分布和暗弱背景星系性质提供了独特实验室。在射电波段，由于背景射电源固有面密度低，可探测的被透镜系统数量受限，星系团尺度引力透镜在宇宙学和天体物理研究中的应用也受到限制，相关研究仍未充分开展。本文概述了SKA将如何凭借其前所未有的灵敏度、角分辨率和巡天速度变革星系团引力透镜研究：这些能力将实现对被透镜背景射电源的密集采样，高保真重建星系团质量分布，同时揭示此前无法观测到的暗弱（微央斯基级）星系，主要位于红移z~1-5。我们聚焦三个关键科学目标：（i）通过改进强引力透镜约束限制星系团中的暗物质子结构；（ii）表征星系团内介质的非热重子成分；（iii）构建具有统计显著性的微央斯基级被透镜星系样本，研究宇宙不同时期（主要为z~1-5）的恒星形成和活动星系核活动。这些进展将共同确立星系团尺度射电引力透镜作为SKA时代研究结构形成和星系演化的强大探针。
英文摘要
Galaxy clusters act as powerful gravitational lenses that provide a unique laboratory for studying the distribution of dark matter and the properties of faint background galaxies. In the radio regime, cluster lensing studies remain largely unexplored due to the intrinsically low surface density of background radio sources, which limits the number of detectable lensed systems and constrains the application of cluster-scale lensing to cosmological and astrophysical investigations. In this paper, we outline how the SKA will transform cluster lensing studies through its unprecedented sensitivity, angular resolution, and survey speed. These capabilities will enable dense sampling of lensed background radio sources and high-fidelity reconstruction of cluster mass distributions, while revealing a previously inaccessible population of faint ($μ$Jy-level) galaxies, primarily at $z \sim 1-5$. We focus on three key science goals: (i) constraining dark matter substructure in galaxy clusters through improved strong-lensing constraints, (ii) characterising the non-thermal baryonic components of the intracluster medium, and (iii) building statistically significant samples of $μ$Jy-level lensed galaxies to study star formation and active galactic nuclei activity across cosmic time (primarily at $z \sim 1-5$). Together, these advances will establish cluster-scale radio lensing as a powerful probe of structure formation and galaxy evolution in the SKA era.
CommentsPublished in Advancing Astrophysics with the SKAII (AASKAII), 2026(arXiv:2606.20366). Report-no:AASKAII/Pandey-Pommier02. Advancing Astrophysics with the SKAII(AASKAII) outlines the transformative scientific advances that will be enabled by the SKA telescopes
