CAREER: The Dynamical Evolution of Galaxies and Galaxy Clusters

职业：星系和星系团的动态演化

• 批准号: 9876143
• 负责人: Chris Mihos
• 金额: $ 45.63万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-01 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9876143&HistoricalAwards=false
• 关键词: CAREER; Dynamical; Evolution; Galaxies; Galaxy

AbstractAST 98-76143MihosRecent advances in observational facilities have lead to an explosion of information on the evolution of galaxies and galaxy clusters in the distant past (at high redshifts) to the present day. This evolution is manifested through the changing morphology of cluster members, the increasing fraction of blue star-bursting galaxies at high redshift, and evidence of substructure in cluster galaxies and X-ray emitting gas. A research project, which synthesizes dynamical simulations of galaxy evolution with observational studies of galaxy clusters to study these evolutionary processes in detail, will be carried out.Numerical simulations will be used to explore the process by which type SO galaxies form in clusters. Different dynamical scenarios will be explored, including galaxy mergers, interactions within the cluster environment, and the effects of cluster ram-pressure stripping on galaxies. Numerical modeling techniques will also be developed to study the onset and evolution of starburst winds in galaxies, following the subsequent evolution of the host galaxies and the formation of the hot X-ray halos around elliptical galaxies and throughout galaxy clusters.Extremely deep imaging of the Virgo cluster of galaxies and other nearby galaxy clusters will be obtained to study the diffuse intracluster light (ICL). The ICL material is stripped from galaxies as they move through the cluster potential and the ICL acts as a fossil record of the dynamical history of the cluster. The central area, 7 degrees by 7 degrees, of the Virgo cluster will be mapped to correlate the structure of the ICL with the properties of the Virgo galaxy population. The dynamical evolution of galaxy clusters in general will be investigated by studying the ICL across a variety of different environments from small groups to rich clusters of galaxies.On the educational front, electronic lecturing techniques will be used to bring the most up-to-date scientific results into the classroom. The creation of web-based curricula will allow students to review class lectures on demand and foster better interaction with, and comprehension of, class material. The dynamical simulations of galaxy and cluster evolution will be used in multimedia computer presentations to bring material to students in a more engaging manner than simple text based lectures. Laboratory courses in astrodynamics will be developed, centered around numerical simulation techniques applied on local computer platforms. Student participation in observational laboratories will be fostered through the use of Case Western Reserve University's robotic telescope. Undergraduate research assistants will be employed in all phases of the computational and observational research programs. Students will have a hands-on experience in modern astrophysics and the scientific method.

AbstractAST 98-76143Mihos 观测设施的最新进展导致有关遥远过去（高红移）至今的星系和星系团演化的信息激增。 这种演化通过星团成员形态的变化、高红移的蓝色星爆星系比例的增加以及星团星系和 X 射线发射气体的亚结构证据来体现。 将开展一个研究项目，将星系演化的动力学模拟与星系团的观测研究相结合，详细研究这些演化过程。数值模拟将用于探索SO型星系团形成的过程。 将探索不同的动力学场景，包括星系合并、星团环境内的相互作用以及星团冲压压力剥离对星系的影响。还将开发数值模拟技术来研究星系中星暴风的发生和演化，以及随后宿主星系的演化以及椭圆星系周围和整个星系团的热X射线晕的形成。将获得室女座星系团和其他邻近星系团的极深成像，以研究弥漫的星系团内光 （ICL）。当星系穿过星团势时，ICL 材料会从星系中剥离，ICL 充当星团动力学历史的化石记录。 室女座星团的中心区域（7 度 x 7 度）将被绘制出来，以将 ICL 的结构与室女座星系群的特性相关联。一般而言，星系团的动态演化将通过研究从小型星系团到丰富星系团的各种不同环境中的 ICL 来研究。在教育方面，将使用电子教学技术将最新的科学成果带入课堂。 基于网络的课程的创建将使学生能够按需复习课堂讲座，并促进与课堂材料的更好互动和理解。 星系和星团演化的动态模拟将用于多媒体计算机演示，以比简单的基于文本的讲座更具吸引力的方式向学生提供材料。 将开发天体动力学实验室课程，以本地计算机平台上应用的数值模拟技术为中心。 通过使用凯斯西储大学的机器人望远镜，将促进学生对观测实验室的参与。 本科研究助理将受聘于计算和观察研究项目的所有阶段。 学生将获得现代天体物理学和科学方法的实践经验。