Dynamics of Compact Objects and Gravitational Wave Simulations

致密物体动力学和引力波模拟

• 批准号: 0244699
• 负责人: Luis Lehner
• 金额: $ 18万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0244699&HistoricalAwards=false
• 关键词: Dynamics; Compact; Objects; Gravitational; Wave

Einstein 's gravitational theory predicts that accelerated masses produce gravitational waves, analogous to the way charges produce electromagnetic waves. Large scale gravitational wave detectors, sensitive enough to observe waves from distant galaxies, are coming into operation. The complexity of Einstein's equations requires computer simulations to predict the gravitational waves produced by realistic astrophysical sources such as compact binary systems a black hole and neutron stars. The major goal of this project is to advance our knowledge in obtaining numerical implementations of Einstein equations and applying these to physically relevant scenarios. The project will explore unresolved issues for approaches using both space-like and light-like initial data especially those which have prevented robust implementations. The first step will be to develop a robust simulation capable of dealing with a generic single black hole interacting with scalar fields. This will serve as test cases for binary black hole systems and black hole-neutron star systems to be implemented subsequently.

爱因斯坦的引力理论预测，加速的质量会产生引力波，类似于电荷产生电磁波的方式。大规模引力波探测器，灵敏到足以观测来自遥远星系的波，即将投入使用。爱因斯坦方程的复杂性需要计算机模拟来预测由现实的天体物理源产生的引力波，如紧凑的双星系统，黑洞和中子星。这个项目的主要目标是推进我们的知识，获得爱因斯坦方程的数值实现，并将其应用到物理相关的场景。该项目将探索使用类空间和类光初始数据的方法中尚未解决的问题，特别是那些阻碍稳健实施的问题。第一步将是开发一个强大的模拟，能够处理一个通用的单个黑洞与标量场的相互作用。这将作为随后实施的双黑洞系统和黑洞-中子星星系统的测试案例。