权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Relativistic Astrophysics of Neutron Stars

中子星的相对论天体物理学

基本信息

批准号：
RGPIN-2019-06077
负责人：
Morsink, Sharon
金额：
$ 1.75万
依托单位：
University of Alberta
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2019
资助国家：
加拿大
起止时间：
2019-01-01 至 2020-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=679959
关键词：
Relativistic Astrophysics Neutron Stars

项目摘要

Neutron stars and black holes are the most compact astrophysical objects in the universe. Their strong gravitational fields allow us to explore a regime of physics inaccessible in terrestrial experiments and to test theories of gravitational physics. Although black holes are reasonably simple objects to describe, neutron stars are considerably more difficult. This is because they are the densest configurations of matter possible which are stable to gravitational collapse. The density in the central core of a neutron star can be many times more dense than nuclear matter. Since experiments on Earth can't reproduce such high densities, the internal structure of a neutron star is not well understood. In particular, if it were possible to measure the size of a neutron star, it would help us understand the properties of supranuclear density matter. ******The main focus of this research proposal is a theoretical study of neutron star dynamics with an emphasis on the electromagnetic radiation they produce. Observations of light originating from systems containing neutron stars, such as pulsars, x-ray binaries, magnetars, and short gamma-ray bursters, provide a great wealth of data with which to compare theoretical predictions. ******The proposed research will involve computational studies of the propagation of light near rapidly rotating neutron stars in order to make theoretical predictions about relativistic effects (such as frame-dragging and gravitational lensing) which may be detectable by present-day and future proposed X-ray telescopes. This work will play an important role in measuring the size and other properties of many neutron stars allowing us to constrain the possible theories of dense nuclear matter which describe the interior of a neutron star.*****

中子星和黑洞是宇宙中最紧密的天体。它们强大的引力场使我们能够探索一种在地球实验中无法实现的物理机制，并测试引力物理理论。尽管黑洞是相当简单的物体来描述，但中子星要难得多。这是因为它们是物质中密度最高的构型，可以稳定到引力崩塌。中子星中央核心的密度可以是核物质密度的数倍。由于地球上的实验不能再现如此高的密度，因此人们对中子星的内部结构没有很好的了解。特别是，如果有可能测量中子星的大小，它将有助于我们了解超核密度物质的性质。*这项研究建议的主要焦点是中子星动力学的理论研究，重点是它们产生的电磁辐射。对包含中子星系统的光的观测，如脉冲星、X射线双星、磁星和短伽马射线暴，为比较理论预测提供了大量数据。*拟议的研究将涉及对快速旋转的中子星附近的光传播的计算研究，以便对相对论效应(如框架拖曳和引力透镜)做出理论预测，这些效应可能会被现在和未来拟议的X射线望远镜探测到。这项工作将在测量许多中子星的大小和其他性质方面发挥重要作用，使我们能够约束描述中子星内部的致密核物质的可能理论。