High-redshift quasars in Euclid

该学生将在欧几里得广域巡天中开发识别高红移z>7类星体的工具，并在2023年欧几里得发射后实施该巡天。第一个任务将是进一步发展搜索算法，以纳入发射线星系。这将在Hypersuprimecam数据发布3上进行测试。调查选择功能的结果将被量化。其次，通过建立一个管道来处理欧几里德档案中的合成数据，开发处理实际欧几里德数据的程序。在应用第一期数据发布前的第一次调查数据之前，将在适当的时候对科学验证数据进行进一步开发。该学生还将为与海德堡的持续合作做出贡献，利用现有的地面数据寻找高z类星体。对已确认的类星体的观测将用于研究再电离时期宇宙中性部分氢的演化。

The student will develop the tools for identifying high-redshift z>7 quasars in the Euclid Wide Field Survey, and then implement the survey after Euclid launch in 2023. The first task will be further development of the search algorithm to incorporate emission-line galaxies. This will be tested on Hypersuprimecam Data Release 3. The consequences for the survey selection function will be quantified. Secondly the procedures for working with actual Euclid data will be developed by building a pipeline to process synthetic data in the Euclid archive. Further development will proceed on science verification data, in due course, before application to the first survey data leading up to Data Release 1. The student will also contribute to an ongoing collaboration with Heidelberg, searching for high-z quasars with existing ground-based data. Observations of the confirmed quasars will be used to investigate the evolution of the cosmic neutral fraction of hydrogen during the epoch of reionisation.