Coalescence of Binary Black Holes and Neutron Stars: Computational Contributions to LIGO

双黑洞和中子星的合并：对 LIGO 的计算贡献

• 批准号: 9902833
• 负责人: Stuart Shapiro
• 金额: $ 19.63万
• 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: 1999
• 资助国家: 美国
• 起止时间: 1999-05-01 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9902833&HistoricalAwards=false
• 关键词: Coalescence; Binary; Black; Holes; Neutron

Gravitational wave forms from the final plunge and coalescence of black-hole and neutron-star binaries are primary targets for LIGO and other gravitational wave interferometers. These wave forms can only be predicted by large-scale numerical computations. Important theoretical and algorithmic issues remain to be solved before successful simulations of compact binary mergers can be achieved. A code for evolving Einstein's equations in three spatial dimensions and with no special symmetries assumed is needed to produce binary coalescence simulations. This code must be stable and accurate. Achieving stability will require theoretical advances in understanding how evolution schemes interact with boundary conditions when the spacetime is evolving dynamically. Evolving neutron stars requires incorporating matter sources into the Einstein equation solver and developing stable and accurate methods for evolving the matter.Thomas Baumgarte and Stuart Shapiro will construct such a code to solve the problem of coalescing compact binaries, combining theory and computation in a symbiotic fashion to make the most rapid progress possible toward the goal of producing gravitational wave forms.

从最终的暴发中形成引力波，黑洞和中子星的二进制物的聚结是Ligo和其他引力波干涉仪的主要靶标。 这些波形只能通过大规模数值计算来预测。 在成功模拟紧凑的二进制合并之前，重要的理论和算法问题仍有待解决。 在三个空间维度中不断发展的爱因斯坦方程的代码，并且没有假定的特殊对称性来产生二元合并模拟。 该代码必须稳定且准确。 实现稳定性将需要理论进步，以了解时空动态发展时如何与边界条件相互作用。 不断发展的中子星需要将物质源纳入爱因斯坦方程求解器，并开发出稳定而准确的方法来发展物质。Thomasbaumgarte和Stuart Shapiro将构建这样的代码，以解决与层次相结合的层次，将理论和计算的层次相结合，以使其迅速发展，从而使目标狂潮相结合。