Elements: An initial value solver for the era of multi-messenger astrophysics

Elements：多信使天体物理时代的初始值求解器

• 批准号: 2310548
• 负责人: Antonios Tsokaros
• 金额: $ 59.72万
• 依托单位: University of Illinois at Urbana-Champaign
• 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: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2310548&HistoricalAwards=false
• 关键词: Elements; initial; value; solver; era

The advent of "multimessenger” astronomy promises to resolve a number of long-standing astrophysical puzzles, such as the origin of short gamma-ray bursts and r-process elements, as well as the nature of matter at supranuclear densities. As already established by event GW170817, the sites where these phenomena take place are mergers of binary neutron stars, and/or black hole--neutron stars. Essential to any general relativistic simulation is the construction of the initial values that will be evolved and which describe the astrophysical system under consideration at an initial moment. This award supports the development of a community open source, general relativistic initial value code useful in the era of multimessenger astronomy. The new code, which will be based on the private Compact Object CALculator code will focus on providing to the astrophysics community modern and accurate modeling tools that are currently not available to them. This system of modules will work together and give users the capability to set up new initial data types. Special attention will be paid to long term sustainability and interconnectivity with current NSF supported cyberinfrastructure. The research and outreach activities supported by this grant help promote the use of computers at all levels of education, as well as the public awareness of some of the latest and most exciting developments in gravitational physics and astrophysics.Modeling of strongly gravitating magnetized compact objects either in isolation or in a binary system is the focus of this award. In addition to numerical modeling, this program involves also analytical treatment of such astrophysically relevant systems in general relativity, relativistic hydrodynamics and magnetohydrodynamics. At the same time the necessary infrastructure to connect the new initial data with a variety of evolution codes that are currently used (and in some cases funded by the NSF), will be developed. Extensive documentation will be produced that will lower the entrance barrier of new researchers in this field. As more sensitive gravitational wave detectors ---such as the NSF-led LIGO Voyager that will provide exquisite observations of neutron stars and stellar mass black holes, or LISA that will target supermassive black holes--- come into operation, the necessity for more realistic and accurate modeling of strongly gravitating multimessenger sources will become imperative. Providing a tool for such modeling is the motivation for this award.This project advances the objectives of "Windows on the Universe: the Era of Multi-Messenger Astrophysics", one of the 10 Big Ideas for Future NSF Investments. The award by the Office of Advanced Cyberinfrastructure is jointly supported by the Physics at the Information Frontier program in the Division of Physics within the Directorate for Mathematical and Physical Sciences.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.

“多信使”天文学的出现有望解决许多长期存在的天体物理学难题，例如短伽马射线爆发和r过程元素的起源，以及超核密度物质的性质。事件 GW170817，这些现象发生的地点是双中子星和/或黑洞的合并——任何一般相对论模拟的关键是构建。将演化的初始值描述了最初考虑的天体物理系统。该奖项支持开发在多信使天文学时代有用的社区开源广义相对论初始值代码。它将基于私有的紧凑对象计算器代码，将专注于为天体物理学界提供目前无法使用的现代且准确的建模工具，该模块系统将协同工作，并使用户能够设置新的初始数据。该赠款支持的研究和推广活动将特别关注长期可持续性和与当前 NSF 支持的网络基础设施的互连性，有助于促进计算机在各级教育中的使用，以及某些领域的公众意识。引力物理学和天体物理学的最新和最令人兴奋的发展。对孤立或双星系统中的强引力磁化致密物体进行建模是该奖项的重点。除了数值建模之外，该项目还涉及此类天体物理学的分析处理。与此同时，将开发必要的基础设施，将新的初始数据与当前使用的各种演化代码（在某些情况下由国家科学基金会资助）连接起来。随着更灵敏的引力波探测器（例如 NSF 领导的 LIGO Voyager）将提供对中子星和恒星的精确观测，文档将降低该领域新研究人员的进入门槛。随着质量黑洞（或以超大质量黑洞为目标的 LISA）投入运行，对强引力多信使源进行更真实、更准确的建模将变得势在必行，为此类建模提供工具是该奖项的动机。该项目推进了“宇宙之窗：多信使天体物理学时代”的目标，这是美国国家科学基金会未来投资的十大创意之一。该奖项由高级网络基础设施办公室共同支持。数学和物理科学理事会物理部的信息前沿物理学项目。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。