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，并涉及美国国家科学基金会“宇宙之窗”大创意的优先领域。最近使用引力波干涉仪和全谱电磁望远镜对双中子星合并的观测开启了多信使天文学和天体物理学的时代。 LIGO、VIRGO 和其他即将推出的类似干涉仪和主要天文设施对新引力波的探测速度迅速增加，预计将在不久的将来从这些来源带来前所未有的大量观测证据。该奖项将资助罗彻斯特理工学院和约翰·霍普金斯大学对中子星合并后期的合作研究工作，特别是坍缩成黑洞和稳定中子星的长寿命超大质量中子星。 这项工作还包括开发这些计算所需的新计算工具。将特别关注状态方程和总质量作为最终属性（例如磁场）的决定因素的作用。 磁场是发生的大部分事情的基础，因为它们同时支持吸积和喷流。对各种天体物理事件的模拟，包括强电磁波和引力波信号源，将需要能够处理越来越广泛的微物理处理的数值工具，特征尺度和复杂程度。另一方面，许多天体物理系统表现出近似对称性，可以利用这些近似对称性来降低总计算成本。通过选择反映近似对称性的坐标拓扑或多个坐标补丁，可以以较低的计算成本获得更高的模拟精度。 球形极坐标网格最适合相对论天体物理学中的许多应用。然而，这些方法通常严重的库朗稳定性限制使得它们的成本过高。 该项目旨在开发新的编码基础设施来克服这些限制，并将其应用于对超大质量中子星遗迹进行高精度且非常快速的模拟。另一方面，多面片方法虽然计算比单个球形面片更复杂，但非常适合模拟这些紧凑物体周围的射流。 除了开发新算法之外，该奖项还将用于培训高度并行计算方面的博士后和研究生。 它还将为学生提供多信使天文学和高性能计算方面的教育材料，并通过各种渠道加强公众宣传，包括多信使天文学的 REU 项目和为少数族裔本科生提供物理研究经验的暑期项目。 通过改善本科生科学教育，将产生进一步的教育效益。 拟议模拟的科学可视化将通过年度社区范围内的公共展览，用作科学和计算公共宣传活动的工具。 更广泛的科学界也将受益：新的模拟工具和输出数据集都将公开。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进行评估，被认为值得支持标准。

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

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

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

Circumbinary Disk Accretion into Spinning Black Hole Binaries

• DOI: 10.3847/1538-4357/abf0af
• 发表时间: 2021-01
• 期刊: The Astrophysical Journal
• 作者: F. L. Lopez Armengol;L. Combi;M. Campanelli;S. Noble;J. Krolik;Dennis B. Bowen;M. Avara;V. Mewes;H. Nakano