Gravitational Waves, Radiation Reaction, and Black Hole Systems

对引力波的探索已经打开了一扇了解宇宙的新窗口，并将允许对我们当前的引力理论进行新的测试。这些波的来源是整个宇宙中可以想象到的最极端的天体物理系统。它们包括黑洞和中子星的双星系统，以及绕轨道运行并最终螺旋形成非常大的黑洞的恒星。将开发新的分析方法来描述这些系统以引力波形式发射能量时的动力学演化。当前对引力波二元源的描述是基于小速度和弱引力场的近似。 当物理系统最有趣时，当物体在合并的最后阶段相互接近时，它们就开始崩溃。 新的、准确的理论预测将会得到发展，并将为引力波探测及其来源表征的实验工作提供重要指导。这项研究将对我们对广义相对论和极端天体物理系统的理解产生广泛的影响。 通过对学生的严格训练，它还将对各个层面的科学教育、欣赏及其公众理解产生影响。各行各业的人们似乎都对涉及黑洞或宇宙学的物理例子着迷。四名研究生和一名本科生深入参与了该项目。 他们有机会发展复杂的计算技能并通过实践经验来学习。 他们将能够跟随其他以前的学生进入科学研究行业。

The search for gravitational waves is already opening a new window on the universe and will allow new tests of our current theory of gravity. Sources of these waves are among the most extreme astrophysical systems imaginable the in the whole universe. They include binary systems of black holes and neutron stars, and stars orbiting and eventually spiralling into very large black holes. New methods of analysis will be developed to describe the dynamical evolution of these systems as they emit energy in the form of gravitational waves.Current descriptions of binary sources of gravitational waves are based on approximations of small speeds and weak gravitational fields. They begin to break down just when the physical system is at its most interesting, as the objects approach each other in their final stage of coalescence. New, accurate theoretical predictions will be developed, and will provide important guidance to experimental effort leading toward the detection of gravitational waves and the characterization of their sources.This research will have a broad impact upon our understanding of General Relativity to extreme astrophysical systems. Through the rigorous training of students, it will also have an impact upon science education, appreciation, and its public understanding, at all levels. People from all walks of life seem fascinated by physics examples involving black holes or cosmology. Four graduate students and an undergraduate are deeply involved in this project. They have the opportunity to develop sophisticated computational skills and to learn by the experience of doing. They will be able to follow other former students into the scientific research profession.