Collaborative Research: Modeling Advanced LIGO Gravitational Wave Sources and Their Electromagnetic Counterparts

合作研究：模拟先进的 LIGO 引力波源及其电磁对应物

• 批准号: 1205732
• 负责人: Christian Ott
• 金额: $ 24.86万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1205732&HistoricalAwards=false
• 关键词: Collaborative; Research; Modeling; Advanced; LIGO

This award will support a multifaceted theoretical study of the mergers of various types of compact objects such as neutron stars. Understanding the full sequence of events in these mergers is a great interdisciplinary challenge of high current interest. The work will model binary formation and gravitational wave-driven inspiral; the hydrodynamics of mergers; the viscous, thermal and nuclear evolution of the post merger remnant; the general relativistic radiation hydrodynamics of the collapse to neutron stars and black holes (with its associated gravitational wave signals); and the nuclear and radiation hydrodynamics of the unbound ejecta that produces observable electromagnetic (light, radio wave, etc.) signals. A major motivation is to model both gravity wave and electromagnetic signatures from these mergers. The two types of signatures provide important information about different regions of the sources. Gravitational waves will determine the 'engine' of the sources, their masses, spins, and inclinations. The electromagnetic signals will provide the precise locations, compositions, and their relation to the rest of astrophysics (nucleosynthesis, pulsars, magnetars, transients, Type Ia supernovae, formation rates and progenitors). The project will contribute to the training of graduate students and in regular student exchanges between the participating institutions. Members of the research team will continue their efforts to give non-technical lectures for the public, high schools and undergraduate institutions, and consult on curricula, films, TV and radio. The results of this research, on topics that tend to generate broad interest (stellar collisions, explosions, collapse to black holes, gravitational waves in space-time), will be incorporated into these activities. The team will also make the results from this study widely available to the astrophysics community.

该奖项将支持对中子星等各种类型致密天体合并的多方面理论研究。了解这些合并事件的全部顺序是当前人们高度关注的一项巨大的跨学科挑战。 这项工作将模拟双星形成和引力波驱动的螺旋；合并的流体动力学；合并后残余物的粘性、热力和核演化；中子星和黑洞塌陷的广义相对论辐射流体动力学（及其相关的引力波信号）；以及产生可观测电磁（光、无线电波等）信号的未结合喷射物的核和辐射流体动力学。 一个主要动机是对这些合并产生的重力波和电磁特征进行建模。这两种类型的签名提供了有关源的不同区域的重要信息。引力波将决定源的“引擎”、它们的质量、旋转和倾角。电磁信号将提供精确的位置、成分及其与天体物理学其余部分（核合成、脉冲星、磁星、瞬变、Ia 型超新星、形成速率和前体）的关系。该项目将有助于研究生的培训以及参与机构之间的定期学生交流。研究团队成员将继续努力为公众、高中和本科院校进行非技术讲座，并提供课程、电影、电视和广播方面的咨询。这项研究的结果，涉及往往引起广泛兴趣的主题（恒星碰撞、爆炸、黑洞塌陷、时空引力波），将被纳入这些活动中。该团队还将向天体物理学界广泛提供这项研究的结果。