AI 中文总结
研究通过射电连续谱辐射追踪宇宙恒星形成历史，介绍了恒星形成星系的射电SFR校准进展及相关研究，强调SKA AA4宽频覆盖和高灵敏度可在宽红移范围为SFGs确定精确射电SED的潜力。
AI 中文摘要
作为不受尘埃影响的大质量恒星形成的示踪剂，射电连续谱辐射为了解宇宙中首批恒星和星系的形成提供了独特窗口。近期观测表明，星系的积分静止帧中射电（约1 - 10 GHz）光度是恒星形成率（SFR）最可靠的示踪剂之一。同步辐射光谱指数和射电光谱能量分布（SED）形状会随红移而演变。这些发现凸显了深度多波段射电连续谱观测在校准早期星系SFR及理解其组装和演化的天体物理过程中的重要性。本文介绍了恒星形成星系（SFGs）的射电SFR校准进展并回顾了宇宙恒星形成历史的射电连续谱研究。强调了平方公里阵列射电望远镜（SKA）AA4的变革潜力，其宽频率覆盖和高灵敏度将能在宽红移范围内为SFGs确定精确的射电SED。
英文摘要
As a tracer of massive star formation unaffected by dust, the radio continuum emission provides a unique window into the formation of the first stars and galaxies in the Universe. Recent observations show that the integrated rest-frame mid-radio (~1-10 GHz) luminosity of galaxies serves as one of the most robust tracers of the star formation rate (SFR). These studies further demonstrate that the synchrotron spectral index and the shape of the radio spectral energy distribution (SED) evolves with redshift as a consequence of the cosmic evolution of star formation activity. These findings underscore the importance of deep multi-band radio continuum observations in calibrating the SFR of early galaxies and understanding the astrophysical processes governing their assembly and evolution over cosmic time. This chapter presents recent progress in radio SFR calibrations for star-forming galaxies (SFGs) and reviews radio-continuum studies of the cosmic star formation history (SFH). We highlight the transformative potential of SKA AA4, whose broad frequency coverage and high sensitivity will enable well-constrained radio SEDs for SFGs across a wide redshift range.
CommentsPublished in Advancing Astrophysics with the SKA II (AASKAII),2026 (arXiv:2606.20366). Report-no:AASKAII/FangxiaAn01
