Black Hole Exhaust: Feedback and the Role of Radio Plasma in Galaxy Clusters

黑洞排气：反馈和射电等离子体在星系团中的作用

• 批准号: 1109347
• 负责人: Sebastian Heinz
• 金额: $ 42.36万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1109347&HistoricalAwards=false
• 关键词: Black; Hole; Exhaust; Feedback; Role

Supermassive black holes located in the centers of massive, centrally-located cluster galaxies can serve as engines of powerful, magnetized jets that interact with the intracluster medium and can profoundly affect the flow of heat within the cluster and the formation of stars within the galaxy. The actual physical mechanisms involved in these interactions between these jets and the host cluster are poorly understood and remain a major challenge to astrophysicists. This project aims to perform magnetohydrodynamic (MHD) computer simulations with the goal of understanding how black holes stop clusters from cooling and how stable cluster atmospheres can be constructed that satisfy all observational requirements of temperature, entropy, field strength and topology and gas composition. At the same time, this research will investigate how magnetized jets evolve self consistently in dynamic environments. The proposed simulations will be the first generation of adaptive mesh refinement-MHD (AMR-MHD) simulations of resolved, ballistic jets in self-consistently evolved, realistic clusters. The principal investigator (PI) will construct the first exhaustive parameter study on how radio galaxies evolve for a set of fundamental jet parameters that include magnetic fields.Educationally, this project will provide funding and training of a postdoctoral research scientist and an undergraduate student. In addition, the PI's public outreach activities include a web site for presenting and explaining this research to a general audience that will include videos of his public lecture series.

超大质量黑洞位于质量中心的星系团星系中心，可以作为强大的磁化喷流的引擎，与星系团内介质相互作用，可以深刻地影响星系团内的热量流动和星系内恒星的形成。这些喷流和宿主星团之间相互作用的实际物理机制尚不清楚，这对天体物理学家来说仍然是一个重大挑战。该项目旨在进行磁流体动力学（MHD）计算机模拟，目的是了解黑洞如何阻止星团冷却，以及如何构建稳定的星团大气，以满足温度、熵、场强、拓扑结构和气体成分的所有观测要求。同时，本研究将探讨磁化射流如何在动态环境中自洽演化。提出的模拟将是第一代自适应网格细化mhd （AMR-MHD）模拟，在自一致进化的现实集群中解决弹道射流。首席研究员（PI）将构建第一个详尽的参数研究，研究射电星系如何根据包括磁场在内的一组基本射流参数演化。在教育方面，该项目将资助和培训一名博士后研究科学家和一名本科生。此外，PI的公共推广活动还包括一个网站，用于向普通观众介绍和解释这项研究，其中包括他的公共讲座系列的视频。