Theoretical Studies in Gravitation and Astrophysics

引力和天体物理学的理论研究

• 批准号: 0090310
• 负责人: Stuart Shapiro
• 金额: $ 41.87万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-06-01 至 2005-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0090310&HistoricalAwards=false
• 关键词: Theoretical; Studies; Gravitation; Astrophysics

The PI will address several problems involving general relativity,the generation of gravitational radiation, relativistichydrodynamics, radiative transport, and stellar dynamics.A common thread uniting the different theoretical topics is the crucial role of gravitation, especially relativisticgravitation as described by Einstein's field equations ofgeneral relativity. Compact objects (black holes and neutron stars) will provide the principal forum, and the understanding the dynamics of matter in a strong gravitational field will be a major theme. Some of the topics that will be investigated include the inspiral and coalescence of binary neutron stars and black holes, the generation of gravitational waves from binaries and other promising astrophysical sources of gravitational radiation, gravitational collapse, the stability of rotating neutron stars and supermassive stars and the final fate of unstable stars, and the formation of supermassive black holes in the cores of galaxies and quasars. Most of the topics that will be addressed represent long-standing, fundamental problems in theoreticalphysics requiring large-scale computation for solution. Hence the approach will involve to a significant degreelarge-scale computations on parallel machines, as well as analytical modeling. Many of the numerical calculations will be carried out using the computational resources of the UIUC's National Center for Supercomputing Applications (NCSA). Utilizing and developing new algorithms for these computers and visualization tools will help advancestate-of-the art computing in the US. The results of the calculations will have an important bearing on forthcoming astronomical observations, including those planned for gravitational wave interferometers, such as LIGO and LISA. The theoretical modeling of gravitational waveforms which will be performed by Shapiro and his group will provideessential input for the identification of sources ofgravitational radiation by these instruments.

PI将解决涉及一般相对论，引力辐射的产生，相对性的流体动力学，辐射运输和恒星动力学的几个问题。一个共同的线程将不同的理论主题结合在一起是引力的关键作用，尤其是爱因斯坦现场相对范围的相对狂热的杂物。紧凑的物体（黑洞和中子星）将提供主要论坛，并且在强烈的引力领域中理解物质的动态将是一个主要主题。 Some of the topics that will be investigated include the inspiral and coalescence of binary neutron stars and black holes, the generation of gravitational waves from binaries and other promising astrophysical sources of gravitational radiation, gravitational collapse, the stability of rotating neutron stars and supermassive stars and the final fate of unstable stars, and the formation of supermassive black holes in the cores of galaxies and quasars.将要解决的大多数主题代表了理论物理学中长期存在的基本问题，需要大规模计算解决方案。因此，该方法将涉及并行机器上的显着脱发尺度计算以及分析建模。许多数值计算将使用UIUC国家超级计算应用中心（NCSA）的计算资源进行。利用和开发这些计算机的新算法和可视化工具将有助于美国的艺术计算。 计算结果将对即将到来的天文观测（包括计划用于重力波干涉仪的计划，例如LIGO和LISA）具有重要意义。 Shapiro及其组将执行的重力波形的理论模型将提供这些仪器来识别的辐射源的输入。