The Phase-Space Structure of Intracluster Light

簇内光的相空间结构

• 批准号: 0707793
• 负责人: Chris Mihos
• 金额: $ 20.9万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0707793&HistoricalAwards=false
• 关键词: Phase; Space; Structure; Intracluster; Light

AST-0707793MihosObservational data have shown that galaxy clusters are filled with diffuse intracluster light (ICL) from stars tidally stripped from their host galaxies. Dr. Chris Mihos of Case Western Reserve University will carry out computer simulations of galaxy clusters to study in detail how the phase-space structure of the ICL depends on the dynamical conditions in clusters and, in turn, how observational measures of ICL can best recover the underlying properties of clusters. He will examine how the evolving morphological and kinematic structure of the ICL constrains recent cluster accretion events, probe the origin of the ICL, and search for phase-space differences in the ICL formed early versus that formed late, examining also how these effects correlate with the physical origin of ICL. Additionally, he will use models to study the ICL-galaxy connection, quantifying the observational longevity of ICL streams both photometrically and kinematically, and correlating streams with individual galaxies. He will also develop techniques to tap this information, deriving trajectories of cluster galaxies and providing tests that constrain models of cluster infall and galaxy evolution.The research will provide a theoretical basis for the interpretation of data from future ground- and space-based telescopes, which will produce an explosion of data that will revolutionize the study of ICL and its use in probing galaxy clusters. A large fraction of this work will constitute a graduate student Ph.D. thesis project, and undergraduates will be involved as well. The principal investigator will create visualizations of cluster simulations as part of his continuing, extensive, public outreach projects.

AST-0707793 Mihos观测数据显示，星系团充满了来自恒星的漫射团内光（ICL），这些恒星从它们的宿主星系潮汐剥离。 凯斯西储大学的Chris Mihos博士将对星系团进行计算机模拟，详细研究ICL的相空间结构如何取决于星系团的动力学条件，以及ICL的观测措施如何最好地恢复星系团的基本性质。 他将研究如何不断发展的形态和运动学结构的ICL约束最近的集群吸积事件，探测的ICL的起源，并寻找相空间差异的ICL形成早期与形成晚期，研究这些影响如何与物理起源的ICL。 此外，他将使用模型来研究ICL-星系的连接，量化ICL流的观测寿命光度和运动学，并将流与单个星系相关联。 他还将开发利用这些信息的技术，推导星系团的轨迹，并提供限制星系团坠落和星系演化模型的测试。这项研究将为未来地面和空间望远镜的数据解释提供理论基础，这将产生数据爆炸，这将彻底改变ICL的研究及其在探测星系团中的应用。 这项工作的很大一部分将构成一个研究生博士学位。论文项目，本科生也将参与其中。 首席研究员将创建集群模拟的可视化，作为他持续的，广泛的，公共宣传项目的一部分。