Collaborative Research: XiRel, A Next Generation Infrastructure for Numerical Relativity

该奖项通过路易斯安那州立大学、宾夕法尼亚州立大学和罗切斯特理工学院的研究人员之间的合作，支持开发用于引力波源（数值相对论）大规模模拟的软件基础设施。最近的突破为数值相对论界提供了发展多轨道双黑洞的基本技术，包括合并和最终的黑洞衰荡阶段。 来自这些计算机模拟的信息有可能提高地基和天基引力波探测器从这些奇异事件中识别这些引力波信号的可能性，并提高在探测到信号时确定这些系统特性的能力。 即将开发的基础设施称为XiRel，将建立在几个开发良好且广泛使用的计算基础设施和新兴标准的基础上，并将其整合在一起，包括Cactus和Carpet。 该项目的初始和主要重点是基于现有的Carpet驱动程序开发一个高度可扩展、高效和准确的自适应网格细化层，该层将在Cactus中完全集成和支持，并针对数值相关性进行优化。 该项目将由科学目标驱动，对初始距离大于目前可能的黑洞双星进行精确模拟，具有不相等的质量和不相等的自旋，并提供对引力波天文学和天体物理学至关重要的可靠物理结果。 该奖项由数学和物理科学理事会的物理部门以及计算机和信息科学与工程理事会的计算和通信基础部门支持。

This award supports the development of software infrastructure for large scale simulations of gravitational wave sources (numerical relativity) through a collaboration among researchers at Louisiana State University, Pennsylvania State University, and Rochester Institute of Technology. Recent breakthroughs have provided the numerical relativity community with the basic techniques in to evolve binary black holes for multiple orbits, including the merger and final black hole ring-down phases. Information from these computer simulations have the potential both to enhance the likelihood that ground-based and space-based gravitational wave detectors will recognize these gravitational wave signals from these exotic events and to improve the ability to determine the properties of these systems if signals are detected. The infrastructure to be developed, called XiRel, will build upon and integrate several well developed and widely used computational infrastructures and emerging standards, including Cactus and Carpet. The initial and primary focus of this project is the development of a highly scalable, efficient and accurate adaptive mesh refinement layer based on the existing Carpet driver, which will be fully integrated and supported in Cactus and optimized for numerical relativity. This project will be driven by the scientific goal to perform accurate simulations of black hole binaries with larger initial separations than currently possible, with un-equal masses and unequal spins, and providing reliable physical results critical for gravitational wave astronomy and astrophysics. This award is supported by the Division of Physics in the Mathematical and Physical Sciences Directorate and by the Division of Computing and Communication Foundations in the Computer and Information Science and Engineering Directorate.