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.

来自黑洞和中子星双星的最终俯冲和合并的引力波形式是LIGO和其他引力波干涉仪的主要目标。 这些波形只能通过大规模的数值计算来预测。 重要的理论和算法问题仍然有待解决之前，成功地模拟紧凑的二进制合并可以实现。 一个代码演变爱因斯坦方程在三维空间，并没有特殊的对称性假设是需要产生二元聚结模拟。 该代码必须稳定和准确。 实现稳定性需要在理解时空动态演化时演化方案如何与边界条件相互作用方面取得理论进展。 演化中子星需要将物质源纳入爱因斯坦方程求解器，并开发稳定而精确的方法来演化物质。托马斯鲍姆加特和斯图尔特夏皮罗将构建这样一个代码来解决合并紧凑双星的问题，将理论和计算以共生的方式结合起来，以尽可能快地朝着产生引力波形式的目标取得进展。