The connection between active galactic nuclei and galaxy formation.

活动星系核(AGN)被认为在阻止最大星系的恒星形成方面发挥了重要作用。然而，人们对它们的起源和成长还知之甚少。这个项目将在流体力学模拟和半解析模型(SAM)中观察活动星系核(AGN)的增长，通过与现有观测数据的比较来约束和改进这些模型，并对欧几里德/WFIRST做出预测。一些具体的子项目包括：*在EAGLE模拟套件中查看黑洞/AGN增长；*在L星系SAM中查看黑洞/AGN增长；*将上述两者与观测结果进行对比；*使EAGLE和/或L星系更好地再现AGN的观测演化；*探索AGN在猝灭恒星形成中的作用。

Active galactic nuclei (AGN) are thought to play a major role in halting star-formation in the largest galaxies. However, their origin and growth are as yet poorly understood. This project will look at the growth of (AGN) in both hydrodynamical simulations and in semi-analytic models (SAMs), constrain and refine those models by comparison with existing observational data, and make predictions for Euclid/WFIRST.Some specific sub-projects include:* Looking at black hole/AGN growth in the EAGLE suite of simulations;* Looking at black hole/AGN growth in the L-Galaxies SAM;* Contrasting both of the above with observations;* Adapting EAGLE and/or L-Galaxies to better reproduce the observed evolution of AGN;* Exploring the role of AGN in quenching star-formation.