Black hole Growth in the Early Universe

该项目的重点是识别早期宇宙中的活动星系核，研究它们所在星系的性质，并开发模型来描述星系及其中心黑洞的共同演化，这些模型可以扩展到最早的宇宙时代。我们将利用一些最先进的光谱调查-包括MOSDEF调查（用10米凯克望远镜进行的49晚大型计划），一个已完成的9晚凯克计划，重点是早期活动星系核（与加利福尼亚大学圣地亚哥分校合作进行），和3DHST调查我们将利用这些巡天来识别活动星系核并确定它们的性质（如它们的光度，黑洞吸积率和它们的遮蔽水平），并将这些测量与其他多波长诊断（包括X射线和红外技术）进行比较。然后，我们将研究活动星系核的性质如何取决于它们所处的星系类型，为早期星系群中黑洞生长的过程提供新的见解。最后，这些结果将被用来开发一个模型有关活动星系核和他们的宿主星系，可以外推到非常早期的宇宙时间，使未来的任务和天文台的预测-特别是侧重于雅典娜天文台，下一个大型X射线使命由欧洲航天局与主导作用的莱斯特大学的发展。

This project will focus on identifying AGN in the early Universe, studying the properties of the galaxies they lie in, and developing models to describe the co-evolution of galaxies and their central black holes that can be extended to the very earliest cosmic times. We will take advantage of a number of state-of-the-art spectroscopic surveys - including the MOSDEF survey (a major 49-night programme with the 10m Keck telescope), a completed 9-night Keck programme that focused on early AGN (carried out in collaboration with the University of California-San Diego), and the 3DHST survey (carried out with the Hubble Space Telescope).We will use these surveys to identify AGN and determine their properties (such as their luminosities, black hole accretion rates, and their level of obscuration) and compare these measurements with other multiwavelength diagnostics (including X-ray and infrared techniques). We will then study how the properties of the AGN depend on the types of galaxies they are found in, providing new insights into the processes fuelling and regulating black hole growth in the early galaxy population. Finally, these results will be used to develop a model relating AGN and their host galaxies that can be extrapolated out to very early cosmic times to make predictions for future missions and observatories - in particular focusing on the Athena observatory, the next large X-ray mission under-development by the European Space Agency with a leading role by the University of Leicester.