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的最新推出，我们可以访问REST框架光谱，以达到非常高的红移。这使我们可以使用低红移时现有的发射线诊断来找到新的AGN（主动银河核）。但是，我们预计人群将进化，这意味着这些诊断可能找不到所有AGN。该项目的重点是使用Beagle-Agn，Beagle-agn是一种贝叶斯SED拟合代码，其中包括来自AGN窄线区域的线排放模型。作为NIRSPEC GTO团队的一部分，该学生将分析新的深度光谱法。使用Beagle-agn识别AGN，并表征狭窄线区域内的气体特性。这将增加现有的检测方法，以在早期宇宙中提供更完整的AGN普查。