Studies of Strong-Gravity Binaries and Their Gravitational Waves

强引力双星及其引力波研究

• 批准号: 2110384
• 负责人: Scott Hughes
• 金额: $ 36万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-15 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2110384&HistoricalAwards=false
• 关键词: Studies; Strong; Gravity; Binaries; Their

This award supports research on the dynamics of binary systems in general relativity, and into characterizing the gravitational waves that such binaries produce. The goal of this work is to improve our understanding of how black holes in binary systems interact with one another, and how their interactions affect the gravitational waves they produce. This work provides a foundation for further observational probes of the dynamics of black holes and ultra-strong gravity. This award also supports “sonifications” of gravitational wave signals, using audio to illustrate how gravitational waves encode source information, as well as online tools for studying the behavior of orbits of spinning black holes.Much of the work supported under this award will use black hole perturbation theory (BHPT), an approach that works well modeling binaries in the large mass ratio limit, when a binary can be regarded as a 'small' object orbiting a large black hole. One planned project investigates how the spectrum of modes excited by binary coalescence varies with the binary's geometry. Substantial progress on this problem was made under prior NSF support; further details including implications for measurement are studied with this award. Other projects include continuing investigations of the dynamics of spinning bodies orbiting black holes, and an analysis of event horizon dynamics in tidally deformed black holes, and studies of the dissipative self force. These projects grew from work that constituted major portions of the Ph.D. theses of graduate students supported by a prior NSF award. Finally, this award supports the development of an open-source version of the PI’s black hole perturbation theory code. A reduced functionality version of this code (restricted to perturbations arising from circular, equatorial orbits) was released in 2018, and has been used by many researchers. The full version will likely be an even more useful product for many colleagues.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项支持对广义相对论中双星系统动力学的研究，以及对这种双星系统产生的引力波的表征。这项工作的目标是提高我们对双星系统中黑洞如何相互作用，以及它们的相互作用如何影响它们产生的引力波的理解。这项工作为进一步观测黑洞动力学和超强引力提供了基础。该奖项还支持引力波信号的“声化”，使用音频来说明引力波如何编码源信息，以及用于研究旋转黑洞轨道行为的在线工具。该奖项支持的大部分工作将使用黑洞摄动理论（BHPT），这种方法可以很好地模拟大质量比极限下的双星，当双星可以被视为绕大黑洞运行的“小”物体时。一个计划中的项目是研究双星合并激发的模式光谱如何随双星的几何形状而变化。在NSF之前的支持下，这个问题取得了实质性进展；进一步的细节，包括对测量的影响，将与该奖项一起研究。其他项目包括继续研究绕黑洞旋转的物体的动力学，分析潮汐变形黑洞的视界动力学，以及研究耗散自力。这些项目是由以前获得美国国家科学基金会奖的研究生的博士论文的主要部分组成的。最后，该奖项支持PI黑洞摄动理论代码的开源版本的开发。该代码的简化功能版本（仅限于圆形赤道轨道引起的扰动）于2018年发布，并已被许多研究人员使用。对于许多同事来说，完整版可能是一个更有用的产品。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Measuring quasinormal mode amplitudes with misaligned binary black hole ringdowns

• DOI: 10.1103/physrevd.105.124030
• 发表时间: 2022-04
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Halston Lim;S. Hughes;G. Khanna

Precisely computing bound orbits of spinning bodies around black holes. I. General framework and results for nearly equatorial orbits

• DOI: 10.1103/physrevd.105.124040
• 发表时间: 2022-01
• 期刊: Physical Review D
• 影响因子: 5
• 作者: L. Drummond;S. Hughes

Surrogate model for gravitational wave signals from nonspinning, comparable-to large-mass-ratio black hole binaries built on black hole perturbation theory waveforms calibrated to numerical relativity

• DOI: 10.1103/physrevd.106.104025
• 发表时间: 2022-04
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Tousif Islam;Scott E. Field;S. Hughes;G. Khanna;V. Varma;M. Giesler;M. Scheel;Lawrence E. Kidder;H. Pfeiffer

Precisely computing bound orbits of spinning bodies around black holes. II. Generic orbits

• DOI: 10.1103/physrevd.105.124041
• 发表时间: 2022-01
• 期刊: Physical Review D
• 影响因子: 5
• 作者: L. Drummond;S. Hughes