Research in Gravitation Theory and Relativistic Astrophysics

该奖项支持的研究在广泛的科学领域产生了影响，远远超出了引力天体物理学。 对中子星物理学的研究可能会导致更精确的测量中子星状态方程的方法，这可能会对核物理学以及相对论天体物理学产生重要影响。引力波搜索可能导致第一次探测到来自旋转中子星r模式的引力波。 这样的观测可以提供大量关于这些恒星高密度核心中基本微物理过程的新信息。 这项工作还将开发新的方法，用于在具有任意拓扑结构的流形上模拟爱因斯坦方程。 这些方法可能会对宇宙学和纯数学产生影响，除了基本的引力理论。 其中一些研究将涉及研究生，因此将有助于下一代引力天体物理学家的发展。这项资助支持的工作将开发更好的数学方法，利用中子星的观测和我们对强引力场的理解来确定中子-星星状态方程，而不需要对中子星星物质的微观物理学进行任何假设。 其他项目包括在公开可用的LIGO数据中搜索旋转中子星的r模式发射的引力波，以及数值相对论的新研究，其中涉及开发在具有任意空间拓扑的流形上求解爱因斯坦方程的技术。这些方法将用于研究各种问题，包括努力探索在流体系统中看到的湍流级联的引力模拟，并探索宇宙学模型的数值，以确定是否以及如何非通过观察可以识别出一个微不足道的拓扑结构。这个奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查进行评估，被认为值得支持的搜索.

The research supported by this award has impacts in a wide range of scientific areas that extend well beyond gravitational astrophysics. Studies on neutron-star physics could lead to more accurate methods of measuring the neutron-star equation of state, and this could have an important impact on nuclear physics in addition to relativistic astrophysics. The gravitational-wave searches could lead to the first detections of gravitational waves from the r-modes of rotating neutron stars. Such observations could provide a wealth of new information about the fundamental micro-physical processes operating in the high density cores of these stars. This work will also develop new methods for performing simulations of Einstein's equations on manifolds with arbitrary topologies. These methods could have impacts on cosmology and pure mathematics, in addition to fundamental gravitation theory. Some of this research will involve graduate students, and will therefore contribute to the development of the next generation of gravitational astrophysicists.The work supported by this grant will develop better mathematical methods for using observations of neutron stars and our understanding of strong gravitational fields to determine the neutron-star equation of state in a way that is free from any assumptions about the microphysics of neutron star matter. Other projects include searches in the publicly available LIGO data for gravitational waves emitted by the r-modes of rotating neutron stars and new research in numerical relativity that involves developing techniques for solving Einstein's equations on manifolds with arbitrary spatial topologies. These methods will be used to study a variety of problems, including an effort to explore the gravitational analog of the turbulent cascade seen in fluid systems and exploring cosmological models numerically to determine whether and how non-trivial topology could be recognized through observations.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.