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

使用 JWST 搜索并表征高红移宇宙中的模糊活动星系核

• 批准号: 2764727
• 金额: --
• 依托单位: University of Hertfordshire
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2764727
• 关键词: Searching; characterising; obscured; AGN; redshift

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.

随着 JWST 最近的推出，我们能够获得红移非常高的静止框架光谱。这使我们能够使用现有的低红移发射线诊断来找到新的 AGN（活跃星系核）。然而，我们预计种群会不断进化，这意味着这些诊断可能无法发现所有 AGN。该项目重点关注使用 BEAGLE-AGN，这是一种贝叶斯 SED 拟合代码，其中包括 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，并表征窄线区域本身的气体特性。这将增加现有的检测方法，以提供早期宇宙中活动星系核的更完整的普查。