RUI: Next-Generation Numerical Relativity for Future Gravitational-Wave Observatories

RUI：未来引力波天文台的下一代数值相对论

• 批准号: 2208014
• 负责人: Geoffrey Lovelace
• 金额: $ 22.58万
• 依托单位: CSU Fullerton Auxiliary Services Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2208014&HistoricalAwards=false
• 关键词: RUI; Next; Generation; Numerical; Relativity

This award supports research in relativity and relativistic astrophysics, and it addresses the priority areas of NSF's "Windows on the Universe" Big Idea. Gravitational waves are ripples of warped spacetime that travel through the universe at the speed of light. They are emitted by the most cataclysmic events in the universe, such as colliding black holes and neutron stars. Today's gravitational-wave observatories have given humanity an entirely new sense to learn about the universe, but they are only sensitive enough to detect the loudest gravitational waves. The next generation of gravitational-wave detectors will reach to the edge of the observable universe and will observe the loudest gravitational waves with extremely high fidelity. This award will help scientists recover the most exciting and surprising physics from these high-fidelity observations. Specifically, this award supports a research program that uses supercomputer calculations to model gravitational waves from merging black holes. Through their participation in this project, undergraduate and master's students at California State University, Fullerton, a Hispanic-serving institution, will play important roles in gravitational-wave astronomy while learning research and computational skills that will prepare them for successful STEM careers. The PI and student researchers will integrate results from this work into a week-long workshop; the workshop will introduce students from Citrus College (a local Hispanic-serving community college) to gravitational waves, high-performance computing, and undergraduate research.This award renews support for California State University, Fullerton's computational gravitational-wave research program. The PI and students at the undergraduate and master's level, working as members of the Simulating eXtreme Spacetimes collaboration, will play key roles in preparing for the application of numerical-relativity modeling to next-generation gravitational-wave observations. First, they will assess the accuracy and performance limits of the Spectral Einstein Code (SpEC), a state-of-the-art numerical-relativity code, to determine how well it can model future detectors' loudest observations, which will have signal-to-noise ratios (SNRs) in the thousands. Second, they will explore the potential for SpECTRE, a next-generation, open-source numerical-relativity code, to model high-SNR observations of merging black holes. They will complete the first assessment of SpECTRE's accuracy, efficiency, and scaling while contributing toward enabling SpECTRE's first simulations of binary black holes. The high-accuracy model gravitational waveforms resulting from this work will help develop improved analytic approximate models necessary for inferring the properties of gravitational-wave sources and for testing general relativity under the most extreme conditions. This work will also reveal the potential of next-generation techniques to model merging black holes while laying a foundation for using them to model black holes tearing apart neutron stars. High-fidelity observations of these events will reveal, with unprecedented fidelity, the behavior of the universe's densest matter and most strongly warped spacetime—but they will require model waveforms with tremendously improved accuracy.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.

该奖项支持相对论和相对论天体物理学的研究，并解决了美国国家科学基金会“宇宙之窗”大理念的优先领域。引力波是以光速穿过宇宙的扭曲时空的涟漪。宇宙中的大多数灾难性事件，例如黑洞碰撞和中子星碰撞，给人类带来了了解宇宙的全新感觉。下一代引力波探测器将到达可观测宇宙的边缘，并以极高的保真度观测到最响亮的引力波，这一奖项将帮助科学家恢复。具体来说，该奖项支持一项利用超级计算机计算来模拟合并黑洞的引力波的研究项目，本科生和学生都参与其中。加利福尼亚州立大学富勒顿分校的硕士生将在引力波天文学中发挥重要作用，同时学习研究和计算技能，为他们成功的 STEM 职业做好准备。 PI 和学生研究人员将整合这项工作的成果。为期一周的研讨会；该研讨会将向柑橘学院（当地一所为西班牙裔服务的社区学院）的学生介绍引力波、高性能计算和本科生研究。该奖项将继续支持加州州立大学富勒顿分校计算引力波研究项目。作为模拟极限时空合作项目的成员，首席研究员和本科生和硕士生将在数值相对论模型应用于下一代引力波观测的准备工作中发挥关键作用。首先，他们将评估光谱爱因斯坦代码（SpEC）（一种最先进的数值相对论代码）的准确性和性能限制，以确定它能够在多大程度上模拟未来探测器的最大声音其次，他们将探索 SpECTRE（下一代开源数值相对论代码）对合并黑色的高 SNR 观测进行建模的潜力。他们将完成对 SpECTRE 精度、效率和尺度的首次评估，同时为 SpECTRE 首次模拟双黑洞做出贡献，这项工作产生的高精度模型引力波形将有助于开发。这项工作还将揭示下一代技术模拟合并黑洞的潜力，同时为利用它们来模拟黑洞合并奠定基础。模型黑洞撕裂中子星 对这些事件的高保真观测将以前所未有的保真度揭示宇​​宙最致密的物质和最强烈扭曲的时空的行为，但它们需要极大改进的模型波形。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力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

Worldtube excision method for intermediate-mass-ratio inspirals: Scalar-field model in 3+1 dimensions

中等质量比螺旋的 Worldtube 切除方法：3 1 维标量场模型

• DOI: 10.1103/physrevd.108.024041
• 发表时间: 2023-07
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Wittek, Nikolas A.;Dhesi, Mekhi;Barack, Leor;Pfeiffer, Harald P.;Pound, Adam;Rüter, Hannes R.;Bonilla, Marceline S.;Deppe, Nils;Kidder, Lawrence E.;Kumar, Prayush;et al
• 通讯作者: et al

Modeling compact binary merger waveforms beyond general relativity

超越广义相对论的紧凑二元合并波形建模

• DOI: 10.1103/physrevd.107.024015
• 发表时间: 2023-01
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Bonilla, Gabriel S.;Kumar, Prayush;Teukolsky, Saul A.
• 通讯作者: Teukolsky, Saul A.