CAREER: Developing Next Generation Gravitational Waveforms for Generic Black-Hole Binaries

职业：为通用黑洞双星开发下一代引力波形

• 批准号: 1945130
• 负责人: Sean McWilliams
• 金额: $ 40万
• 依托单位: West Virginia University Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-12-15 至 2024-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1945130&HistoricalAwards=false
• 关键词: CAREER; Developing; Next; Generation; Gravitational

The measurements of gravitational waves by the Advanced Laser Interferometer Gravitational wave Observatory (LIGO) are becoming ever more precise with time. The need for more accurate and efficient gravitational waveform models for black-hole binaries (BHBs) is substantial and urgent if we hope to realize a wide range of potential applications in terms of performing high precision astronomical observations, such as determining the formation mechanism of BHBs throughout the Universe, or searching for small deviations from General Relativity. This project will help realize the full potential of future Advanced LIGO measurements, by creating a far more accurate and efficient waveform model. In addition to the scientific components, this proposal will help facilitate a program of outreach that will reach schools and venues for the general public throughout the state of West Virginia.The PI's group will apply the current Backwards One-Body (BOB) model to study recoil, generate merger models for well-motivated alternative theories, and compare to the small number of available numerical relativity (NR) results. This work will be concurrent with, but independent from, the separately funded work developing a new approximant within LALSuite that evolves the most state-of-the-art Effective One-Body (EOB) model, SEOBNRv4P, in spherical coordinates, and replaces the ringdown attachment with BOB. The team will then modify the inspiral evolution to utilize a co-precessing frame, separate the relevant dynamical timescales, and create an integration routine to maximize timesteps. Finally, they will develop a new version of BOB with an evolving background spacetime in order to ensure accuracy at earlier times, and thereby create a model with comparable accuracy to NR, but entirely independent from NR. They will apply this model to conduct a detailed comparison with existing NR-calibrated models, in order to better establish systematic uncertainties. This work will ensure that future gravitational-wave observations are only limited by the sensitivity of the instrument, and not by the presence of modeling error. In addition, this proposal will help facilitate a program of outreach that will reach schools and venues for the general public throughout the state of West Virginia, by developing new demonstrations and presentations and training students within the WV SPOT program and the WVU Astronomy Club to present them, and also by bringing a major outreach event, an updated version of the Celebrating Einstein performances previously hosted at WVU, to multiple venues, and to numerous audiences including entire classes of students from schools throughout the state.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.

随着时间的推移，高级激光干涉引力波天文台（LIGO）对引力波的测量变得越来越精确。如果我们希望在进行高精度天文观测方面实现广泛的潜在应用，例如确定整个宇宙中黑洞双星的形成机制，或寻找与广义相对论的微小偏差，则需要更准确和有效的黑洞双星（BHB）引力波形模型。该项目将通过创建更准确和更有效的波形模型，帮助实现未来先进LIGO测量的全部潜力。除了科学的组成部分，这个建议将有助于促进一个外展计划，将达到学校和场馆的一般公众在整个西弗吉尼亚州。PI的小组将应用当前的向后一体（BOB）模型来研究反冲，产生合并模型的动机良好的替代理论，并比较了少数可用的数值相对论（NR）的结果。这项工作将与单独资助的工作同时进行，但独立于在LALSuite中开发一种新的近似物，该近似物在球坐标中发展了最先进的有效单体（EOB）模型SEOBNRv4P，并用BOB取代了振铃附件。然后，该团队将修改inspiral进化，以利用协同处理框架，分离相关的动态时间尺度，并创建一个集成例程以最大化时间步长。最后，他们将开发一个具有不断发展的背景时空的新版本BOB，以确保早期的准确性，从而创建一个与NR具有可比精度的模型，但完全独立于NR。他们将应用该模型与现有的NR校准模型进行详细比较，以便更好地建立系统不确定性。这项工作将确保未来的引力波观测只受仪器灵敏度的限制，而不受建模误差的限制。此外，该提案将有助于促进一项外展计划，该计划将覆盖西弗吉尼亚州的学校和公众场所，通过在WV SPOT计划和WVU天文学俱乐部内开发新的演示和演示并培训学生来展示它们，还将带来一个重大的外展活动，庆祝爱因斯坦表演的更新版本，以前在WVU举办，该奖项反映了NSF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

Sensitivity of present and future detectors across the black-hole binary gravitational wave spectrum

• DOI: 10.1088/1361-6382/abd4f6
• 发表时间: 2021-03
• 期刊: Classical and Quantum Gravity
• 影响因子: 3.5
• 作者: A. Kaiser;S. McWilliams

Induced spins from scattering experiments of initially nonspinning black holes

最初非自旋黑洞的散射实验引起的自旋

• DOI: 10.1103/physrevd.100.124045
• 发表时间: 2019
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Nelson, Patrick E.;Etienne, Zachariah B.;McWilliams, Sean T.;Nguyen, Viviana
• 通讯作者: Nguyen, Viviana