AI 中文总结
本综述概述ΛCDM模型的小尺度观测差异问题，介绍自相互作用暗物质（SIDM）框架的理论基础、解决方案、最新进展及星系团对暗物质自相互作用截面的观测约束。
AI 中文摘要
标准Λ冷暗物质（ΛCDM）模型在解释大尺度宇宙结构的形成与演化方面取得了显著成功，得到了宇宙微波背景、大尺度结构巡天、星系团等大量观测的支持。但理论预测与小尺度观测存在差异，推动了对包括自相互作用暗物质（SIDM）在内的替代暗物质模型的探索。本综述概述了CDM结构形成的理论基础、小尺度挑战，以及SIDM框架内提出的解决方案，总结了SIDM框架的最新理论进展，并重点讨论了星系团对暗物质自相互作用截面的当前观测约束。
英文摘要
The standard $Λ$ Cold Dark Matter ($Λ$CDM) model has achieved remarkable success in explaining the formation and evolution of cosmic structures on large scales, supported by a wide range of observations, including the cosmic microwave background, large-scale structure surveys, and galaxy clusters. However, discrepancies between theoretical predictions and observations on small scales, have motivated the exploration of alternative dark matter models, including the self-interacting dark matter (SIDM) scenario. This review provides an overview of the theoretical foundations of CDM structure formation, the small-scale challenges, and the solutions proposed within the SIDM framework. We summarize recent theoretical developments in the SIDM framework and discuss current observational constraints on the dark matter self-interaction cross-section with particular emphasis on galaxy clusters.
Comments34 pages, 5 figures. Invited review for "One Hundred and Ten Years of General Relativity: Reviews and Perspectives". Accepted for publication in IJMPD
