Dynamical Evolution of Globular Clusters

球状星团的动力学演化

• 批准号: 9119965
• 负责人: Haldan Cohn
• 金额: $ 20.85万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-01 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9119965&HistoricalAwards=false
• 关键词: Dynamical; Evolution; Globular; Clusters

Understanding the dynamical evolution of dense stellar systems, such as globular clusters and galactic nuclei, is one of the most fundamental problems of gravitational astrophysics. Substantial progress towards this goal has been made in recent years as a result of both theoretical and observational advances. Frequent star-star gravitational interactions cause a profound evolution of the overall structure of these systems on astrophysically interesting time scales. Powerful computer simulation methods have firmly established the inevitable evolution of globular clusters of stars toward the collapse of the core of the cluster. The advent of new observing instrumentation and the ability to achieve high angular resolution from ground based observatories have both led to significant advances in the observational study of globular clusters and galactic nuclei. Drs. Cohn and Lugger at the University of Indiana will continue their research program of theoretical and observational investigations of the dynamical evolution of globular clusters. The principal goals are: to develop realistic, evolving, dynamical models for globular clusters; to carry out large scale optical observational studies of globular cluster structure, kinematics, and stellar content, using both ground-based telescopes and the Hubble Space Telescope; and to fit observational data for globular clusters with numerical models.

了解致密恒星系统的动力学演化， 如球状星团和星系核，是地球上 引力天体物理学的基本问题 实质性 近年来，在实现这一目标方面取得了进展， 这是理论和观测进步的结果。 频繁 恒星之间的引力相互作用导致了 这些系统的整体结构 有趣的时间尺度。 强大的计算机模拟方法， 坚定地确立了球状星团不可避免的演化 星系团核心的坍缩。 的 新的观测仪器的出现和实现 地面观测站的高角分辨率 导致了球状星团观测研究的重大进展 星系团和星系核。 印第安纳州大学的科恩和卢格博士将继续 他们的理论和观测研究项目 球状星团动力学演化的研究。 主要目标是：开发现实的、不断发展的、动态的 球状星团模型;进行大规模光学 球状星团的结构，运动学， 和恒星的含量，使用地面望远镜和 哈勃太空望远镜;并将观测数据拟合为球状 集群与数字模型。