Building New Insights to Galaxy Cluster Physics and Evolution

建立对星系团物理和演化的新见解

• 批准号: 2205885
• 负责人: Thomas Jones
• 金额: $ 27.28万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-15 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2205885&HistoricalAwards=false
• 关键词: Building; New; Insights; Galaxy; Cluster

Galaxy clusters are the largest self-gravitating structures in the universe, sometimes containing thousands of galaxies. On the largest scales, matter in the universe - galaxies, gas and dark matter - is distributed in a vast cosmic web of interconnecting filaments. Galaxy clusters are believed to form at the intersection of these filaments through accretion – gas funneled through the filaments onto the cluster – or through mergers of smaller galaxy clusters. A team from the University of Minnesota, Twin Cities, will use high resolution computer simulations to better understand observational signatures of merging and other dynamical events on the intracluster medium (ICM). Such features include shocks, turbulence, and cold fronts. In addition, they will carry out high resolution simulations of the effect of radio jets – jets of plasma emitted from black holes that reside in the centers of galaxies – on the ICM. The Principal Investigator (PI) will continue training students in high performance computing and will create videos to be used by the the Bell Museum of Natural History and Planetarium. In addition, he will continue his work with the Radio Galaxy Zoo citizen science project. The proposal includes a collaboration with the Hewlett Packard Enterprise High Performance Computing Team.The aims of this project include; applying novel magneto-hydrodynamic (MHD) simulations to better understand the interaction of radio jets and the ICM; modeling the physics of non-thermal particle transport and acceleration needed for reliable links between non-thermal, cosmic ray emissions and ICM dynamics; conducting cosmological, MHD cluster assembly simulations in order to better relate observed ICM structures to the dynamical state and history of a given cluster.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

星系团是宇宙中最大的自引力结构，有时包含数千个星系。在最大尺度上，宇宙中的物质--星系、气体和暗物质--分布在一个由相互连接的细丝组成的巨大宇宙网中。星系团被认为是通过吸积在这些细丝的交叉点形成的-气体通过细丝漏斗状地进入星系团-或者通过较小的星系团的合并。来自明尼苏达大学双子城分校的一个研究小组将使用高分辨率计算机模拟来更好地理解星团内介质（ICM）上合并和其他动力学事件的观测特征。这些特征包括激波、湍流和冷锋。此外，他们还将对无线电射流的影响进行高分辨率模拟-从位于星系中心的黑洞发射的等离子体射流-对ICM的影响。首席研究员（PI）将继续在高性能计算方面培训学生，并将创建贝尔自然历史博物馆和天文馆使用的视频。此外，他将继续他的工作与无线电银河动物园公民科学项目。该建议包括与惠普企业高性能计算小组的合作，该项目的目标包括：应用新的磁流体动力学模拟，以更好地了解无线电喷流与ICM的相互作用;建立非热粒子传输和加速物理模型，这是在非热宇宙射线发射与ICM动力学之间建立可靠联系所必需的;进行宇宙学的MHD星团组装模拟，以便更好地将观测到的ICM结构与给定星团的动力学状态和历史联系起来。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。