Hydrodynamic Calculations of Coalescing Compact Binaries

聚结致密双星的流体动力学计算

• 批准号: 0245028
• 负责人: Frederic Rasio
• 金额: --
• 依托单位: Northwestern 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: 2003-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0245028&HistoricalAwards=false
• 关键词: Hydrodynamic; Calculations; Coalescing; Compact; Binaries

Supercomputer simulations of the final coalescence and merger of compact binary stars will be performed using a new 3D relativistic hydrodynamic computer code developed by the PI and his students. In particular, the first 3D relativistic calculations of the tidal disruption of a neutron star by a black hole in a close binary system will be performed using this code. The gravitational wave signals emitted during these compact binary merger events will be computed self-consistently as part of the simulations. The dependence of the signals on the properties of the nuclear fluid will be studied systematically.Coalescing binary systems containing compact stars are among the most important sources of gravitational radiation for current laser interferometer detectors such as LIGO. The theoretical study of gravitational wave sources is crucial for the interpretation of data to be collected by the interferometers, and for the planning of future, more advanced detectors. The new hydrodynamic calculations for binaries containing a neutron star in orbit around a black hole will represent asignificant improvement over previous, more approximate treatments. The study of coalescing compact binaries is important for many other problems of great current interest in astrophysics, such as the origin of gamma-ray bursts, and the production of heavy elements in galaxies. The 3Drelativistic hydrodynamics code developed by the PI is a general tool, which will be useful for studying many other problems involving relativistic stars and fluids. Public outreach activities are planned that will take advantage of the resources of the nearby Adler Planetarium and Astronomy Museum in Chicago and will educate the public about Einstein's theory of General Relativity and the great discovery potential of gravitational wave astronomy.

超级计算机模拟致密双星的最终合并和合并将使用由 PI 和他的学生开发的新 3D 相对论流体动力学计算机代码进行。特别是，将使用该代码对封闭双星系统中黑洞对中子星的潮汐破坏进行首次 3D 相对论计算。在这些紧凑的双星合并事件期间发出的引力波信号将作为模拟的一部分进行自洽计算。我们将系统地研究信号对核流体特性的依赖性。包含致密星的聚结双星系统是当前激光干涉仪探测器（例如 LIGO）最重要的引力辐射源之一。引力波源的理论研究对于解释干涉仪收集的数据以及规划未来更先进的探测器至关重要。对包含黑洞周围轨道上的中子星的双星进行的新的流体动力学计算将比以前更近似的处理方法取得重大改进。聚结致密双星的研究对于当前天体物理学中备受关注的许多其他问题非常重要，例如伽马射线爆发的起源以及星系中重元素的产生。 PI 开发的 3D 相对论流体动力学代码是一个通用工具，可用于研究涉及相对论恒星和流体的许多其他问题。计划开展公共宣传活动，利用附近芝加哥阿德勒天文馆和天文博物馆的资源，向公众宣传爱因斯坦的广义相对论和引力波天文学的巨大发现潜力。