发表机构
Swinburne University of Technology; ARC Centre of Excellence for Dark Matter Particle Physics; ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions（斯威本科技大学; ARC暗物质粒子物理卓越中心; ARC三维全天体物理学卓越中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
SAGE26模型通过五项观测驱动的改进，从宇宙黎明至今调节星系形成，特别是引入无反馈爆发星系以匹配韦布望远镜观测到的高红移大质量星系，并改进星系周介质处理，同时保持计算效率，代码开源。
AI 中文摘要
我们介绍了SAGE26，这是对半解析星系演化（SAGE）模型的全面更新。SAGE26整合了五项观测驱动的改进：（1）区分星系周介质与热晕气体物理，（2）分子氢用于恒星形成，（3）速度与红移依赖的超新星反馈，（4）随时间追踪的核球半径，以及（5）无反馈爆发星系。每项改进都致力于从宇宙黎明至今调节星系形成。最重要的是，加入无反馈爆发星系提供了一条途径，以詹姆斯·韦布空间望远镜观测到的丰度产生高红移大质量星系。此外，新的星系周介质框架通过使用特征性星系晕激波质量，区分低质量晕中的自由落体受限内流与大质量星系群和星系团中的流体静力学冷却，从而改进了重子的处理。SAGE26在宇宙时间尺度上再现了关键观测约束，包括恒星质量函数和宇宙恒星形成率密度，同时保留了其前身的计算效率和灵活性。代码和数据产品是开源的，可公开获取。
英文摘要
We present SAGE26, a comprehensive update to the Semi-Analytic Galaxy Evolution (SAGE) model. SAGE26 integrates five observationally motivated improvements: (1) distinct circumgalactic medium and hot-halo gas physics, (2) molecular hydrogen for star formation, (3) velocity- and redshift-dependent supernova feedback, (4) bulge radii tracking through time, and (5) feedback-free burst galaxies. Each improvement works to regulate galaxy formation from cosmic dawn to the present. Most significantly, the addition of feedback-free burst galaxies provides a pathway to produce high-redshift massive galaxies at the abundances observed by the James Webb Space Telescope. Furthermore, the new circumgalactic medium framework improves the treatment of baryons by distinguishing between free-fall-limited inflow in low-mass haloes and hydrostatic cooling in massive groups and clusters using a characteristic halo shock mass. SAGE26 reproduces key observational constraints across cosmic time, including the stellar mass function and cosmic star formation rate density, while retaining the computational efficiency and flexibility of its predecessor. The code and data products are open-source and publicly available.
Comments26 pages, 13 figures, 3 tables
