RUI: Probing Quark Matter through Compact Star Oscillations

RUI：通过致密星振荡探测夸克物质

• 批准号: 1608959
• 负责人: Prashanth Jaikumar
• 金额: $ 18万
• 依托单位: California State University-Long Beach Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2020-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1608959&HistoricalAwards=false
• 关键词: RUI; Probing; Quark; Matter; through

The recent discovery of gravitational waves from Black Holes by the NSF-funded US-based LIGO observatories has captured the public imagination and opened a new observational window to our Cosmos, much like the discovery of the telescope did in Galileo's time. There is broad consensus in the scientific community that LIGO will soon detect gravitational waves from numerous neutron stars in our Galaxy, which were first observed by radio pulses in the 1960s. Unlike radio waves however, gravitational waves carry information about the interior of neutron stars, which will reveal new insight into nuclear physics at high density and temperature. This project is focused on improving the odds of detecting the gravitational waves from neutron stars by constructing accurate mathematical models of neutron stars and the signals they emit. Integrating nuclear physics and astrophysics, the PI will use modern computational algorithms to estimate key parameters that affect the spectrum of gravitational waves emitted by neutron stars. Results from this research will reduce the computational cost of searching for gravitational wave signals, refine existing models of nuclear physics, and train several graduate students from CSU Long Beach in the methods of scientific research.In this project, the PI will calculate the non-radial oscillation modes of compact stars made in part or entirely of strange quark matter and will study their relevance to gravitational wave signatures. The goal is to discover trends in the mode spectrum that can be used as gravitational wave fingerprints of the inner structure of neutron stars. Using theoretical principles of fluid dynamics and general relativity, supplemented by numerical routines, this research will advance the understanding of nuclear physics at high density and its implications for compact star oscillations. Novel aspects of this research include investigating the impact of composition gradients, superfluidity, and mixed phases in quark matter on the oscillation spectrum of multi-component strange/hybrid stars. The proposed methods for this research involve numerical coding to solve coupled equations of fluid dynamics in strongly gravitating spacetime inside compact stars. Through these tasks, this project will help quantify the non-radial oscillation modes for realistic quark matter equations of state, identify robust and model-dependent features of the oscillation spectrum and propose distinguishing features between neutron stars and strange stars that can be tested by gravitational wave detectors.

NSF资助的总部位于美国的Ligo天文台从黑洞中发现引力波的最新发现捕捉了公众的想象力，并为我们的宇宙打开了一个新的观测窗口，就像在伽利略时代的望远镜发现一样。科学界达成了广泛的共识，Ligo将很快发现我们银河系中许多中子恒星的引力波，这在1960年代首次被无线电脉冲观察到。但是，与无线电波不同，重力波携带有关中子星内部的信息，这将揭示在高密度和温度下对核物理学的新见解。该项目的重点是改善通过构建中子恒星的准确数学模型及其发出的信号来检测中子恒星的重力波的几率。 PI整合核物理学和天体物理学，将使用现代计算算法来估计影响中子星排出的引力波谱的关键参数。 Results from this research will reduce the computational cost of searching for gravitational wave signals, refine existing models of nuclear physics, and train several graduate students from CSU Long Beach in the methods of scientific research.In this project, the PI will calculate the non-radial oscillation modes of compact stars made in part or entirely of strange quark matter and will study their relevance to gravitational wave signatures.目的是在模式频谱中发现趋势，该趋势可用作中子恒星内部结构的重力波指纹。使用流体动力学和一般相对性的理论原理，并补充了数值常规，这项研究将提高对高密度及其对紧凑型星振荡的影响的理解。这项研究的新方面包括研究夸克物质中组成梯度，超流体和混合相对多组分奇异/混合星的振荡光谱的影响。这项研究的建议方法涉及数值编码，以求解紧凑型恒星内部时空的耦合方程。通过这些任务，该项目将有助于量化现实的状态夸克物质方程，确定振荡频谱的强大和依赖模型的特征，并提出可以通过重力波检测器测试的中子星和奇怪的恒星之间的特征。

项目成果

Oscillation modes of strange quark stars with a strangelet crust

具有奇异子地壳的奇异夸克星的振荡模式

• 发表时间: 2017
• 期刊: Compact Stars in the QCD Phase Diagram V
• 作者: Asbell, Jessica;Jaikumar, Prashanth
• 通讯作者: Jaikumar, Prashanth

Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter

• DOI: 10.1155/2017/6472909
• 发表时间: 2017-01
• 期刊: Advances in High Energy Physics
• 影响因子: 1.7
• 作者: T. Mandal;P. Jaikumar