Searching for and characterising obscured AGN in the high redshift Universe with JWST

随着最近JWST的发射，我们可以使用静止框架光学光谱达到非常高的红移。这使我们能够利用现有的低红移发射线诊断来发现新的活动星系核。然而，我们预计人群会进化，这意味着这些诊断方法可能无法找到所有的AGN。该项目重点使用BEAGLE-AGN，这是一种贝叶斯sed拟合代码，包括AGN窄线区域的线发射模型。作为NIRSpec GTO团队的一员，该学生将分析新的深度光谱。使用BEAGLE-AGN识别AGN，并描述窄线区域内的气体特性。这将增加现有的探测方法，以提供早期宇宙中AGN的更完整的普查。

With the recent launch of JWST, we have access to rest-frame optical spectroscopy out to very high redshifts. This allows us to find new AGN (Active Galactic Nuclei) using existing emission line diagnostics at low redshift. However, we expect the population to evolve meaning those diagnostics may not find all AGN. This project focuses on using BEAGLE-AGN, a bayesian SED-fitting code that includes models of line emission from AGN narrow-line regions. As part of the NIRSpec GTO team, this student will analyse new, deep spectroscopy. Identify AGN using BEAGLE-AGN, and characterise the gas properties within the narrow line regions themselves. This will add to existing detection methods to provide a more complete census of AGN in the early Universe.