The life of radio galaxies in clusters: joint surveys by eROSITA and ASKAP

中心射电星系的反馈控制着星系团中的稀气体，而星系团中的稀气体又决定着星系团中射电星系的演化。我们希望通过两个新的调查来研究这种相互关系：eROSITA全天空巡天，eRASS 1，在X射线和宇宙进化图（EMU）的调查与澳大利亚ASKAP望远镜在无线电波段。eROSITA将发现前所未有的X射线数量，暗能量巡天的EMU试点巡天绘制了270平方度的天空场下降到约25 μ Jy/束的噪声水平，分辨率为10弧秒。预计它将对大约20万个射电源进行成像和编目。这些目录是交叉匹配对多波长目录，并在可能的情况下包含红移和classification.We would like to执行一个分析的射电星系团检测，无论是，与EMU和ineRASS 1.特别是，我们想进行形态学研究，并调查作为其环境的函数的射电星系的属性。主要的科学问题是：射电星系是如何在一个不均匀但静态的ICM中演化的？射电星系如何在动态ICM中演化？叶瓣的内压预算是多少？为了回答这些问题，我们将把复杂的机器学习技术应用于这些独特的新无线电和X射线数据。中心源的无线电特性和宿主星系团的X射线特性之间的相关性将产生对无线电模式反馈机制的独特见解。在这个项目的这一部分中，我们关注的问题是，来自中央射电星系的能量输入是否能够抵消ICM的冷却损失。

Feedback by central radio galaxies controls the dilute gas in galaxy clusters and the dilute gas in galaxy clusters shapes the evolution of radio galaxies in clusters. We wish to study this reciprocal relation using two novel surveys: the eROSITA all-sky survey, eRASS1, in X-rays and the Evolutionary Map of the Universe (EMU) survey with the Australian ASKAP telescopes in the radio band.eROSITA will discover an unprecedented number of X-ray galaxy clusters and image them with an angular resolution of 30 arc seconds.The EMU pilot survey maps 270 square degrees of sky in the Dark Energy Survey field down to a noise level of about 25 $\mu$Jy/beam at 10 arc second resolution. It is expected to image and catalog about 200,000 radio sources. These catalogs are cross-matched against multi-wavelength catalogs, and where possible contain redshifts and classifications.We would like to perform an analysis of radio galaxies in clusters detected, both, with EMU and ineRASS1. In particular, we would like to perform a morphological study and investigate the properties of radio galaxies as a function of their environment. The main scientific questions are: How do radio galaxies evolve in a non-uniform, but static ICM? How do radio galaxies evolve in a dynamic ICM? What is the internal pressure budget of lobes? To answer these questions, we will apply sophisticated machine-learning techniques to these unique new radio and X-ray data.Correlations between the radio properties of the central source and the X-ray properties of the host cluster will yield unique insights into the mechanics of radio-mode feedback. In this part of the project, we focus on the question whether the energy input from the central radio galaxy is able to offset the cooling losses of the ICM.