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WoU-MMA: Aspects of Numerical Relativity and Relativistic Astrophysics

WoU-MMA：数值相对论和相对论天体物理学的各个方面

基本信息

批准号：
2309210
负责人：
Elias Most
金额：
$ 30万
依托单位：
California Institute of Technology
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2023
资助国家：
美国
起止时间：
2023-07-01 至 2026-06-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309210&HistoricalAwards=false
关键词：
WoU MMA Aspects Numerical Relativity

项目摘要

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 wave (GW) events of binary neutron star (NS) mergers are exciting sources for multi-messenger astronomy and astrophysics (MMA). With one such event (GW170817) already detected and several more anticipated over the next observing run of LIGO next year, one of the important questions of modern gravitational theory and MMA is to connect all the available channels of information to the underlying physics probed in the system. Specific questions include: What is the dense matter equation of state (EoS)? When and how are transients produced by merging NS? What is the general outcome of a NS-NS merger? Those can only be fully answered by novel insights from numerical relativity (NR) simulations of the merger and post-merger, which need to consider all the relevant (small-scale) microphysics associated with hot dense matter, magnetic fields, and weak-interaction physics. This award will make significant advances in the modeling of small-scale physics in NS-NS mergers. This project will also produce animations and movies of numerical simulations for public outreach. These will be made available to educators and the public via dedicated web pages, social media channels. In addition, graduate and undergraduate students supported by this project will receive extensive professional and educational training. This award will push the frontier in our understanding of the impact of realistic small-scale microphysics on the production of EM counterparts, relativistic outflow launching, and the outcome of NS-NS mergers. This will enable a novel class of NR simulations with significantly improved predictive power for the interpretation of GW events and their MMA aspects. Modeling small-scale dissipative effects (viscosities and heat conductivity) in relativistic fluids with magnetic fields in strong gravity, is also of fundamental interest to the gravitational, nuclear, and astrophysics communities. This project will develop a new cyberinfrastructure, a public simulation code for dissipative general-relativistic magnetohydrodynamics coupled with dynamic gravity, and study its applications to the post-merger stage of NS-NS coalescence.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，并阐述了美国国家科学基金会“宇宙之窗”大构想的优先领域。双中子星合并引力波(GW)事件是多信使天文学和天体物理(MMA)的激发源。鉴于已经探测到一个这样的事件(GW170817)，预计明年LIGO的下一次观测还会有几个这样的事件，现代引力理论和MMA的一个重要问题是将所有可用的信息渠道与系统中探索的基本物理联系起来。具体问题包括：什么是致密物质状态方程(EOS)？合并NS在什么时候以及如何产生瞬变？NS-NS合并的总体结果是什么？只有通过对合并和合并后的数值相对论(NR)模拟的新见解才能完全回答这些问题，这些新见解需要考虑与热致密物质、磁场和弱相互作用物理相关的所有相关(小尺度)微物理。该奖项将在NS-NS合并中的小规模物理建模方面取得重大进展。该项目还将为公众宣传制作数字模拟的动画和电影。这些将通过专门的网页和社交媒体渠道提供给教育工作者和公众。此外，该项目支持的研究生和本科生将接受广泛的专业和教育培训。这一奖项将推动我们在理解现实小规模微物理对EM对应物的生产、相对论外流发射以及NS-NS合并的结果方面的前沿。这将使一类新的NR模拟能够显著提高对GW事件及其MMA方面的解释的预测能力。对具有强重力磁场的相对论流体中的小尺度耗散效应(粘度和导热系数)进行建模，也是引力、核物理和天体物理学领域的基本兴趣。该项目将开发一个新的网络基础设施，一个结合动态重力的耗散广义相对论磁流体力学的公共模拟代码，并研究其在NS-NS合并后阶段的应用。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。