Theoretical and Numerical Studies in Gravitation and Relativistic Astrophysics

引力和相对论天体物理学的理论和数值研究

• 批准号: 9001645
• 负责人: Charles Evans
• 金额: $ 19.7万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1993-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9001645&HistoricalAwards=false
• 关键词: Theoretical; Numerical; Studies; Gravitation; Relativistic

Theoretical and numerical studies will be initiated for an array of problems in gravitational physics and relativistic astrophysics. Topics of interest include (1) development of techniques in numerical relativity and their application in modeling sources of gravitational radiation and in exploring nonlinear, dynamical spacetimes; (2) numerical modeling of the tidal disruption of stars during close encounters with massive black holes and the possible relevance of disruption for feeding active galactic nuclei; (3) the calculation of magnetohydrodynamic (MHD) winds from accretion disks and stars and the development of a general relativistic MHD numerical scheme; and (4) a study of the recently discovered eclipsing millisecond pulsar 1957+20. The goal of this work is to acquire a deeper understanding of self-gravitating and dynamical systems and of high energy (relativistic) phenomena. Many of these physical studies rely upon the use of large-scale numerical modeling techniques. Accordingly, useful byproducts of such studies are almost invariably new and refined numerical algorithms. The project relating to the eclipsing pulsar 1957+20 is of a more phenomenological nature and relies upon the close interplay between theoretical calculation and observational evidence.

理论和数值研究将用于引力物理学和相对论天体物理学中的一系列问题。 感兴趣的主题包括（1）数值相对论技术的发展及其在引力辐射的建模和探索非线性，动力学空间的应用中的应用； （2）在与巨大黑洞的近距离相遇期间，恒星潮汐破坏的数值模型以及喂养活性银河核的破坏可能相关性； （3）从增生磁盘和恒星中计算磁水动力学（MHD）风以及一般相对论的MHD数值方案的发展； （4）一项对最近发现的毫秒粉的研究，1957年+20。 这项工作的目的是更深入地了解自我造成的和动态的系统以及高能量（相对论）现象。 这些物理研究中的许多都取决于大规模数值建模技术的使用。 因此，此类研究的有用副产品几乎总是新的和精致的数值算法。 与Eclips Pulsar 1957+20有关的项目具有更现象的性质，并依赖于理论计算和观察证据之间的紧密相互作用。