Waveform Modelling for Gravitational Wave Astrophysics

引力波天体物理学的波形建模

• 批准号: 2268664
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2268664
• 关键词: Waveform; Modelling; Gravitational; Wave; Astrophysics

Accurate models of the gravitational-wave signal emitted by generic configurations of black-hole binaries as they inspiral and collide, have been essential to measure the properties of the black holes observed in the first gravitational-wave detections from Advanced LIGO. One of the most pressing problems is the modelling of generic binaries, where the black-hole spins introduce wild dynamics that generate complicated waveforms. We currently have a preliminary waveform model, but this does not take into account the subtle precession effects at the black holes approach merger, or their effect on the waveform as the final black hole rings down. It is also important, for both gravitational-wave searches and measurements of physical parameters, to determine those physical parameters that have the dominant effects on the waveform structure, and are therefore the parameters that can be most precisely measured. This has an impact both on how we construct waveform models, and on the astrophysical questions that can be answered with gravitational-wave observations. Several research directions are possible, including modelling the late-inspiral waveforms of generic systems, using these models to estimate the physics that can be measured from GW observations, and studying astrophysics from binary-black-hole observations.

黑洞双星在螺旋和碰撞时发出的引力波信号的精确模型，对于测量高级LIGO第一次引力波探测中观察到的黑洞的性质至关重要。最紧迫的问题之一是一般双星的建模，其中黑洞旋转引入了产生复杂波形的狂野动力学。我们目前有一个初步的波形模型，但这并没有考虑到黑洞接近合并时的微妙进动效应，或者当最终的黑洞环下降时它们对波形的影响。对于引力波搜索和物理参数的测量来说，确定那些对波形结构有主要影响的物理参数也很重要，因此也是可以最精确测量的参数。这对我们如何构建波形模型以及可以通过引力波观测回答的天体物理学问题都有影响。有几个研究方向是可能的，包括对一般系统的后期螺旋波形进行建模，使用这些模型来估计可以从GW观测中测量的物理学，以及从双黑洞观测中研究天体物理学。