Neutron Stars as Probes of Fundamental Physics

中子星作为基础物理的探测器

• 批准号: 0708640
• 负责人: Feryal Ozel
• 金额: --
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0708640&HistoricalAwards=false
• 关键词: Neutron; Stars; Probes; Fundamental; Physics

The answers to numerous fundamental problems in physics and compact object astrophysics depends on accurately determining the masses and radii of neutron stars. This project will lay the theoretical foundations for accurately measuring neutron star masses, as well as their equations of state and for probing neutron star spacetimes. Dr. Ozel and students will address through major computational calculations (i) the dependence of the Eddington limit on the neutron star spin and the geometry of the emitted radiation, (ii) the emission spectra of bursting, weakly magnetic neutron stars at high temperatures where non-coherent scattering is dominant, and (iii) the corrections to the emitting area and to redshifted line profiles arising from the complex metric of rotating neutron stars. By directly comparing the theoretical work to X-ray observations of rapidly-rotating, highly relativistic and accreting neutron stars, this research will answer several outstanding questions in compact object astrophysics, gravitational physics, and quantum chromodynamics. Major questions to be addressed include the state of matter in regions of the quantum chromodynamic phase diagram that complement the early universe studies and an assessment of accreting neutron stars as gravity wave sources by establishing mass-spin correlations. Through this work, graduate students at the University of Arizona will be trained in theoretical and computational work in astrophysics and gravitational physics. Dr. Ozel will include the results of this work in her expanding public outreach efforts which popularize neutron stars and black holes through public television programs, press interviews, and public talks.

物理和紧凑物体天体物理学中许多基本问题的答案取决于准确确定中子星的质量和半径。该项目将奠定理论基础，以准确测量中子星质量及其状态方程和探测中子星的空间。 Ozel博士和学生将通过主要的计算计算（i）伊丁顿限制对中子恒星旋转和发射辐射的几何形状的依赖性，（ii）在高温下爆发，弱磁性中子星的发射光谱，在非连接散射的高温下，占主导地位和（iii）对旋转的旋转和红色的旋转量的校正，并散发出了旋转的旋转，并散发出了复杂的旋转，并将其变为旋转的旋转，并将其变为复杂的旋转。通过将理论工作直接与快速旋转，高度相对论和增强中子星的X射线观察进行比较，这项研究将回答紧凑型物体天体物理学，引力物理学和量子染色体动力学方面的几个出色问题。要解决的主要问题包括量子染色体动力学相图中的物质状态，该区域通过建立质量旋转相关性来补充早期宇宙研究和将中子星作为重力波源评估作为重力波源的评估。通过这项工作，亚利桑那大学的研究生将接受天体物理学和引力物理学的理论和计算工作培训。 Ozel博士将在她不断扩大的公开外展工作中包括这项工作的结果，这些宣传活动通过公共电视节目，新闻访谈和公开谈判来普及中子明星和黑洞。