Collaborative Research: Deploying Curvilinear Coordinate and Multipatch Methods on Neutron Star Mergers

合作研究：在中子星合并中部署曲线坐标和多面体方法

• 批准号: 2110338
• 负责人: Manuela Campanelli
• 金额: $ 45万
• 依托单位: Rochester Institute of Tech
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2110338&HistoricalAwards=false
• 关键词: Collaborative; Research; Deploying; Curvilinear; Coordinate

This award supports research in relativity and relativistic astrophysics and it addresses the priority areas of NSF's "Windows on the Universe" Big Idea. The recent observations of a binary neutron star merger using both gravitational wave interferometers and the full spectrum of electromagnetic telescopes has initiated the age of multimessenger astronomy and astrophysics. The rapidly increasing rate of new GW detections by LIGO, VIRGO, and other upcoming similar interferometers and major astronomical facilities is expected to bring an unprecedented wealth of observational evidence from these sources in the near future. This award will fund a collaborative research effort at the Rochester Institute of Technology and the Johns Hopkins University into the latter stages of neutron star mergers, in particular long-lived hypermassive neutron stars that collapse to black holes and stable neutron stars. The effort also includes development of new computational tools required for these calculations. Particular attention will be paid to the roles of the equation of state and total mass as determinants of final properties such as magnetic fields. Magnetic fields underly much of what happens because they support both accretion and jets.Simulations of a wide range of astrophysical events, including strong sources of both electromagnetic and gravitational wave signals, will require numerical tools that can handle an increasingly wide range of microphysical treatments, characteristic scales, and levels of complexity. On the other hand, many astrophysical systems exhibit approximate symmetries that can be leveraged to reduce the total computational cost. By choosing coordinate topologies that mirror the approximate symmetries, or multiple coordinate patches, one can obtain higher simulation accuracies at lower computational costs. Spherical polar grids are optimally suited for a host of applications in relativistic astrophysics. However, the often severe Courant stability limitation of these methods have made them prohibitively expensive. This project is to develop new coding infrastructures to overcome these limitations and apply them to perform highly-accurate, but also very fast simulations of hypermassive neutron star remnants. On the other hand, multipatch method, while computational more complex than single spherical patches, are ideal for simulations of jets around these compact objects. In addition to developing new algorithms, this award will be used train a postdoc and a graduate student in highly-parallelized computing. It will also provide material for educating students in multimessenger astronomy and high-performance computing, and enhance public outreach through a variety of channels, including both an REU program in multimessenger astronomy and a summer program giving underrepresented minority undergraduates experience in physics research. Further educational benefits will accrue through improvements in undergraduate science education. Scientific visualizations from the proposed simulations will be used as a vehicle for public outreach events on science and computing through annual community-wide public exhibits. There will also be benefits to the broader scientific community: both the new simulation tools and the output data sets will be made public.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，并介绍了NSF“宇宙上的Windows”的优先领域。最近使用重力波干涉仪和全部电磁望远镜的二进制中子星合并的观察结果启动了多中音天文学和天体物理学的年龄。 Ligo，处女座以及其他即将到来的类似的干涉仪和主要的天文学设施的新GW检测速度迅速增加，预计将在不久的将来带来前所未有的观察证据。该奖项将资助罗切斯特理工学院和约翰·霍普金斯大学的合作研究工作，以进入中子星合并的后期，尤其是长期寿命的高质量中子星，这些明星崩溃了，倒入黑洞和稳定的中子星。 工作还包括开发这些计算所需的新计算工具。将特别注意状态方程和总质量作为最终特性（例如磁场）的决定因素。 磁场是由于它们支持积聚和喷射的大部分发生的磁场。在包括电磁和引力波信号的强大来源的广泛的天体物理事件中，将需要数值工具，这些工具将需要处理越来越广泛的微物理处理，特征性量表和复杂性水平。另一方面，许多天体物理系统表现出近似对称性，可以利用这些对称性，以降低总计算成本。通过选择反映近似对称性或多个坐标斑块的坐标拓扑，可以在较低的计算成本下获得更高的模拟精度。 球形极性网格最适合相对论天体物理学中的许多应用。但是，这些方法通常严重的courant稳定性限制使它们非常昂贵。 该项目是开发新的编码基础架构来克服这些局限性，并将其应用于高度准确的，但也非常快速地模拟了高质量中子星形残留物。另一方面，多捕获方法虽然计算方法比单个球形贴片更复杂，但非常适合在这些紧凑的对象周围的喷气机模拟。 除了开发新算法外，该奖项还将用于训练博士后和高度平行计算的研究生。 它还将为学生提供多通用习惯天文学和高性能计算的材料，并通过各种渠道来增强公共外展，包括一项REU Multimessenger天文学计划和夏季计划，提供了代表性不足的少数族裔本科生在物理学研究领域的经验。 进一步的教育益处将通过改善本科科学教育的改善而产生。 拟议的模拟中的科学可视化将用作通过年度社区范围的公共展览的公共宣传活动和计算公共宣传活动的工具。 更广泛的科学界也将带来好处：新的仿真工具和输出数据集将公开。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，认为值得通过评估来获得支持。

项目成果

Mass-ratio and Magnetic Flux Dependence of Modulated Accretion from Circumbinary Disks

环形盘调制吸积的质量比和磁通量依赖性

• DOI: 10.3847/1538-4357/ac2229
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: Noble, Scott C.;Krolik, Julian H.;Campanelli, Manuela;Zlochower, Yosef;Mundim, Bruno C.;Nakano, Hiroyuki;Zilhão, Miguel
• 通讯作者: Zilhão, Miguel

Minidisk Accretion onto Spinning Black Hole Binaries: Quasi-periodicities and Outflows

旋转黑洞双星上的迷你盘吸积：准周期性和流出

• DOI: 10.3847/1538-4357/ac532a
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Combi, Luciano;Lopez Armengol, Federico G.;Campanelli, Manuela;Noble, Scott C.;Avara, Mark;Krolik, Julian H.;Bowen, Dennis
• 通讯作者: Bowen, Dennis

Population of Merging Compact Binaries Inferred Using Gravitational Waves through GWTC-3

• DOI: 10.1103/physrevx.13.011048
• 发表时间: 2021-11
• 期刊: Physical Review X
• 影响因子: 12.5
• 作者: The Ligo Scientific Collaboration;The Virgo Collaboration;T. Abbott;T. Abbott;F. Acernese;K. Ackley

HARM3D+NUC: A New Method for Simulating the Post-merger Phase of Binary Neutron Star Mergers with GRMHD, Tabulated EOS, and Neutrino Leakage

• DOI: 10.3847/1538-4357/ac1119
• 发表时间: 2021-06
• 期刊: The Astrophysical Journal
• 作者: A. Murguia-Berthier;S. Noble;L. Roberts;E. Ramirez-Ruiz;Leonardo R. Werneck;Michael Kolacki;Z. Etienne

Measuring the Hubble Constant with GW190521 as an Eccentric black hole Merger and Its Potential Electromagnetic Counterpart

• DOI: 10.3847/2041-8213/abe388
• 发表时间: 2021-02
• 期刊: The Astrophysical Journal Letters
• 作者: V. Gayathri;J. Healy;J. Lange;B. O'Brien;M. Szczepańczyk;I. Bartos;M. Campanelli;S. Klimenko;C. Lousto;R. O’Shaughnessy