RUI: Dense Matter and Gravitational Waves: The Coalescence of Neutron Star Binaries

RUI：稠密物质和引力波：中子星双星的合并

• 批准号: 1307545
• 负责人: Jocelyn Read
• 金额: $ 12.6万
• 依托单位: CSU Fullerton Auxiliary Services Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2018-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1307545&HistoricalAwards=false
• 关键词: RUI; Dense; Matter; Gravitational; Waves

The Laser Interferometer Gravitational-wave Observatory (LIGO) is on the brink of making the first direct detections of gravitational waves. With the improved sensitivity of Advanced LIGO, we expect to enter an era of astronomy in which frequent gravitational-wave measurements are used to learn about astrophysical sources. The inspiral and merger of binary neutron stars is a likely source for many gravitational-wave observations, and waveform models for the inspiral of such systems can be used to detect the signals using matched filtering. However, additional physics near merger is not captured by detection templates. As the stars coalesce, the gravitational waveforms will depend additionally on the properties of matter in the core of the stars. The relevant behavior is encoded in the equation of state of dense matter. Its effects on gravitational waveforms have not yet been fully modeled; while ever-improving analytic models in the inspiral and numerical simulations of the merger each contribute information, a complete picture remains elusive. This award supports a program of research by the PI and her students at California State University Fullerton (CSUF) to understand the effects of neutron-star matter on inspiral and merger, both by constructing hybrid (analytical-numerical) waveforms with explicit error estimates and by developing phenomenological waveforms which incorporate tidal resonance effects. The results will be incorporated into the public LIGO Algorithm Library for use in realistic search and parameter-estimation studies with the full data analysis infrastructure. The proposed research is essential to maximize the astrophysical return on NSF's investment in LIGO. Improved understanding of measurement potential will inform configuration decisions as Advanced LIGO develops. Gravitational-wave measurements of neutron-star matter effects will potentially shine new light on the equation of state of matter above nuclear density, which is currently uncertain and a key research topic in both nuclear physics and astrophysics. This proposal also supports active involvement by undergraduate and masters students in the Physics program at CSUF, a primarily undergraduate Hispanic-serving institution with strong integration of teaching and research. Including students in cutting-edge research introduces them to the gravitational-wave science community, kindles future participation in science, and develops broadly applicable skills. The PI is actively involved in LIGO outreach, and will engage students, the University, and the surrounding community in the excitement of this new field of astronomy.

激光干涉仪重力波观测站（LIGO）在首次直接检测引力波的边缘。随着晚期LIGO的灵敏度的提高，我们希望进入一个天文学时代，在该时代，频繁的重力波测量用于学习天体物理来源。 二进制中子星的灵感和合并是许多引力波观测的可能来源，并且可以使用匹配的滤波来检测此类系统灵感的波形模型。但是，合并附近的其他物理不会被检测模板捕获。随着恒星的聚结，重力波形将进一步取决于恒星核心中物质的特性。相关行为是在密集物质状态的方程式中编码的。它对引力波形的影响尚未完全建模。在合并的灵感和数值模拟中，始终改善分析模型每一个都贡献信息，但完整的图像仍然难以捉摸。 该奖项支持加利福尼亚州立大学富勒顿大学（CSUF）的PI及其学生的一项研究计划，以了解中子星物质对Inspiral和合并的影响，均通过构建具有明确的误差估算的混合（分析 - 数字）波形，并通过开发融合Tidal rosonance效应的混合（分析 - 数字）波形。该结果将通过完整的数据分析基础架构将结果纳入公共Ligo算法库中，以用于现实搜索和参数估计研究。 拟议的研究对于最大程度地提高了NSF在Ligo投资的天体物理回报至关重要。随着高级LIGO的发展，对测量潜力的了解将为配置决策提供信息。中子星物质效应的重力波测量结果可能会使核密度高于物质状态的方程式发明新的启示，这是目前不确定的核物理和天体物理学的关键研究主题。 该建议还支持本科生和硕士学生在CSUF的物理学计划中积极参与，这是一家主要是西班牙裔美国人服务机构，具有强烈的教学和研究整合。 包括尖端研究的学生在内，将他们介绍给引力波科科学界，点燃未来参与科学的参与，并发展广泛适用的技能。 PI积极参与Ligo宣传活动，并将与学生，大学和周边社区与这个新的天文学领域的兴奋。

项目成果

GW190814: Gravitational Waves from the Coalescence of a 23 Solar Mass Black Hole with a 2.6 Solar Mass Compact Object

• DOI: 10.3847/2041-8213/ab960f
• 发表时间: 2020-06-01
• 期刊: ASTROPHYSICAL JOURNAL LETTERS
• 影响因子: 7.9
• 作者: Abbott, R.;Abbott, T. D.;Zweizig, J.
• 通讯作者: Zweizig, J.