Computational Relativity and Gravitation at Petascale: Simulating and Visualizing Astrophysically Realistic Compact Binaries

摘要/0832606该奖项为“蓝水”项目团队与一组天体物理学研究人员之间的技术协调提供旅费，以探索在“蓝水”系统上使用天体物理学代码的准备情况。如果成功，预计该代码将用于研究与非常密集的天体对合并有关的一系列问题。其中包括：不对称黑洞双子星的合并，中子星双子星的合并，以及黑洞和中子星的合并。通过精确的模拟，研究人员希望描述这些事件的重力波特征，以期在地面探测器接收到重力波信号时提供有用的信息。在中子星合并过程较慢的情况下，中子星合并前的振荡模式被认为依赖于它们的内部结构，因此数值模拟和探测到的引力波信号的比较应该提供关于中子星内部结构的间接信息。另一个研究课题是黑洞周围相对论性吸积盘的动力学行为。中子星和中子星？中子星合并。后一项研究的目的之一是表征由被破坏的中子星和吸积盘相互作用产生的高能电磁辐射。与Blue Waters一起进行的研究将涉及许多研究生和本科生。研究结果将被纳入本科和研究生课程。除科学出版物外，研究结果还将通过访客计划进行传播。项目团队包括来自代表性不足群体的研究人员和年轻的研究人员。项目小组计划通过演讲吸引当地高中班级，并通过参加为期两周的高中学生学术课程吸引高中生。

ABSTRACT/0832606This award provides travel funds to support technical coordination between the Blue Waters project team and a team of astrophysical researchers to explore the readiness of an astrophysics code for use on the Blue Waters system. If successful, it is anticipated that the code will be used for investigations of a series of problems associated with the merger of pairs of very dense astrophysical objects. These include: the merger of asymmetric black hole binaries, of neutron star binaries, and the merger of a black hole and a neutron star. Through accurate simulations, the researchers hope to characterize the gravity wave signatures of these events with a view to contributing information that will be useful in the diagnosis of gravity wave signals when these are received in terrestrial detectors. In the case of the slower process of neutron star merger, the oscillation modes of the neutron stars prior to merger are believed to be dependent on their internal structure so that comparison of numerical simulations and detected gravity wave signals should provide indirect information about the internal structure of neutron stars. A further topic of investigation is the dynamical behavior of relativistic accretion disks around black hole ? neutron star and neutron star ? neutron star mergers. One aim of these latter investigations is to characterize the highly energetic electromagnetic radiation generated through the interaction of the disrupted neutron star and the accretion disk.The research to be done with Blue Waters will involve a number of graduate students and undergraduates. Results of the work will be included in undergraduate and graduate courses. Results will be disseminated through a visitor program in addition to scientific publications. The project team includes researchers from under-represented groups and young investigators. The project team plans to engage local high-school classes through presentations and high-school students through participation in a two-week academic program for high-school students.