Giant radio galaxies and their environments explored using radio continuum and polarisation data from ASKAP

使用 ASKAP 的射电连续谱和偏振数据探索巨型射电星系及其环境

• 批准号: 2903653
• 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: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2903653
• 关键词: Giant; radio; galaxies; their; environments

Supermassive black holes [SMBHs] in the centre of massive galaxies can produce powerful radio jets which affect their host galaxies as well as their surroundings. The link between SMBH jets, their host galaxies and the large-scale environment is key for understanding radio galaxy evolution. This PhD project will use excellent radio continuum and polarisation data (in hand) of GAMA23 field (Gurkan et al. 2022) collected using the Square Kilometer Array pathfinder ASKAP in conjunction with multi-wavelength data available. The student will select normal- and giant-size radio galaxies (which are amongst the largest single objects in the Universe, reaching to sizes 5 Mpc; e.g. Milky Way has a size of ~0.01 Mpc) in the GAMA23 field. The combination of radio intensity, polarimetry from ASKAP and the excellent ancillary data will give a unique opportunity to investigate the relation between the impact of radio jets onto their host galaxies and their environments for statistically meaningful samples of radio sources, and compare these with simulations (e.g. Hardcastle & Krause 2014, Hardcastle 2018). More importantly, this will allow the student to establish methods for other fields with radio data, in preparation for the biggest radio astronomy project the SKA. With this project the student will have the opportunity to develop a set of crucial skills (in coding, data fitting and radio data analysis) easily transferable to other fields/subjects.

大质量星系中心的超大质量黑洞（SMBH）可以产生强大的射电喷流，影响其宿主星系及其周围环境。SMBH喷流、它们的宿主星系和大尺度环境之间的联系是理解射电星系演化的关键。这个博士项目将使用GAMA 23场（Gurkan等人，2022）的优秀无线电连续谱和偏振数据（手头），这些数据是使用平方公里阵列探路者ASKAP结合可用的多波长数据收集的。学生将在GAMA 23场中选择正常和巨型射电星系（它们是宇宙中最大的单个物体之一，大小达到5 Mpc;例如银河系的大小约为0.01 Mpc）。来自ASKAP的无线电强度，偏振测量和优秀的辅助数据的组合将提供一个独特的机会来研究无线电喷流对其宿主星系的影响与其环境之间的关系，以获得具有统计意义的无线电源样本，并将这些与模拟进行比较（例如Hardcastle & Krause 2014，Hardcastle 2018）。更重要的是，这将使学生能够利用无线电数据建立其他领域的方法，为最大的射电天文学项目SKA做准备。通过这个项目，学生将有机会培养一套关键技能（编码，数据拟合和无线电数据分析），这些技能很容易转移到其他领域/科目。