Modeling Multi-fluid and Gravitational Dynamics of Compact Stars with Quark Matter Cores

用夸克物质核心模拟致密恒星的多流体和引力动力学

• 批准号: 0855558
• 负责人: Gregory Comer
• 金额: $ 5.85万
• 依托单位: Saint Louis University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0855558&HistoricalAwards=false
• 关键词: Modeling; Multi; fluid; Gravitational; Dynamics

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The main goal of this project is to build a comprehensive theoretical formalism that will model physical properties of so-called compact stars, which are the collapsed cores---about 20 kilometers in diameter but with the mass of the sun---of ordinary stars that have exhausted their nuclear fuel. Like the earth, a compact star has an outer crust, magnetic field, inner layers containing one or more fluids, and perhaps even a solid core. The formalism will use state-of-the-art nuclear physics of matter at extreme densities to model compact star rotations and oscillations as well as their gravitational waves (which are the propagating ripples of spacetime curvature first predicted by Einstein soon after his completion of General Relativity).When completed, the formalism will naturally tie into key research goals of the Laser Interferometer Gravitational Wave Observatory (LIGO), designed to detect the gravitational waves produced by compact stars. Gravitational wave, or even upper limit, data obtained by LIGO can be used to test compact star models to yield an improved understanding of the nuclear physics and fluid and solid behavior of matter at extreme densities, potentially large magnetic fields, and gravitational fields that are so large that general relativity must be used to get accurate results.

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。该项目的主要目标是建立一个全面的理论形式体系，来模拟所谓的致密恒星的物理特性。致密恒星是耗尽核燃料的普通恒星的坍缩核心——直径约20公里，质量与太阳相当。像地球一样，致密恒星有外壳、磁场、含有一种或多种流体的内层，甚至可能有一个固体内核。这种形式主义将使用最先进的物质在极端密度下的核物理学来模拟致密恒星的旋转和振荡，以及它们的引力波（这是爱因斯坦在完成广义相对论后不久首次预测的时空曲率的传播波纹）。一旦完成，这种形式将自然而然地与激光干涉仪引力波天文台（LIGO）的关键研究目标联系起来，LIGO旨在探测致密恒星产生的引力波。引力波，甚至上限，LIGO获得的数据可以用来测试致密恒星模型，以提高对核物理和物质在极端密度下的流体和固体行为的理解，潜在的大磁场，以及引力场如此之大，必须使用广义相对论才能得到准确的结果。