AI 中文总结
该研究提出利用平方公里阵列（SKA）观测射电星系，构建框架以追踪不同时期的宇宙网，探究环境等因素对射电星系演化等过程的影响。
AI 中文摘要
平方公里阵列（SKA）将凭借前所未有的灵敏度、角分辨率、频率覆盖范围和巡天速度，通过追踪宇宙时间中的射电星系（RGs）和恒星形成系统，彻底改变宇宙网的研究。由吸积超大质量黑洞驱动的RGs不仅是活动星系核（AGN）反馈的标志，还是其环境的敏锐探针，环境涵盖从致密星系团到低密度的星系际介质。它们的瓣、磁场和能量外流编码了周围气体的热和非热历史，提供了兆秒差距尺度上的星系际介质（IGM）压力、粒子老化和磁化的诊断。SKA拥有宽频率覆盖（50 MHz-15 GHz）、微央斯基到亚微央斯基的连续谱灵敏度以及宽视场，将在宽红移和环境范围内探测到大量射电源种群。对源大小、形态、光谱老化、射电功率、偏振和法拉第旋转的测量，将揭示环境如何调节喷流传播和瓣演化、射电等离子体如何加热并磁化星系团内和星系际介质，以及早期AGN活动如何影响原星系团中的星系生长和恒星形成。结合寄主星系识别、光谱红移以及光学、红外、X射线、 Sunyaev-Zel'dovich和宇宙网目录，SKA观测将把RGs置于其三维大尺度环境中。本章提出了利用RGs追踪和探测宇宙网的框架，从邻近的纤维和星系团到高红移原星系团，以测试环境、磁场、反馈和气体动力学如何在宇宙时间中塑造射电星系演化、原星系团形成和恒星形成。
英文摘要
The Square Kilometre Array will transform studies of the cosmic web by tracing radio galaxies (RGs) and star-forming systems across cosmic time with unprecedented sensitivity, angular resolution, frequency coverage, and survey speed. Powered by accreting supermassive black holes, RGs are not only signposts of AGN feedback but also incisive probes of their environments, from dense clusters to the low-density intergalactic medium. Their lobes, magnetic fields, and energy outflows encode the thermal and non-thermal histories of the surrounding gas, offering diagnostics of IGM pressure, particle ageing, and magnetisation over megaparsec scales. With its broad frequency coverage (50 MHz-15 GHz), microJy to sub-microJy continuum sensitivity, and wide field of view, the SKA will detect vast radio-source populations across broad ranges of redshift and environment. Measurements of source size, morphology, spectral ageing, radio power, polarisation, and Faraday rotation will reveal how the environment regulates jet propagation and lobe evolution, how radio plasma heats and magnetises the intracluster and intergalactic media, and how early AGN activity influences galaxy growth and star formation in protoclusters. Combined with host identifications, spectroscopic redshifts, and optical, infrared, X-ray, Sunyaev--Zel'dovich, and cosmic-web catalogues, SKA observations will place RGs within their three-dimensional large-scale environments. This chapter presents a framework for using RGs to trace and probe the cosmic web, from nearby filaments and clusters to high-redshift protoclusters, and to test how environment, magnetic fields, feedback, and gas dynamics shape radio-galaxy evolution, protocluster assembly, and star formation across cosmic time.
CommentsPublished in Advancing Astrophysics with the SKA II (AASKAII), 2026 (arXiv:2606.20366). Report-no:AASKAII/Dabhade01. Advancing Astrophysics with the SKA II (AASKAII) outlines the transformative scientific advances that wilL be enabled by the SKA telescopes
