含重重子致密星的性质研究  

Research on the Properties of Neutron Stars with Heavy Baryons

作　　者：杨易 Yang Yi(School of Physical Science and Technology,Southwest University,Chongqing,China)

机构地区：[1]西南大学物理科学与技术学院,重庆

出　　处：《科学技术创新》2023年第1期116-119,共4页Scientific and Technological Innovation

摘　　要：自进入多信使天文学时代,关于中子星的实验信息激增,为状态方程提供了最严格的观测限制,也为致密物质的相结构理论提供了全新的约束。核子-超子-Δ混合相致密星模型是一种非常有前景的模型。本文采用协变密度泛函理论构建的超子-Δ混合相状态方程,初步探索了传统中子星和超子-Δ混合相致密星的静态性质,考察了具有两类物相结构致密星的质量与半径、转动惯量、潮汐形变关系之间的相似与差异之处。研究发现非核子自由度显著降低致密星的最大质量,转动惯量和潮汐形变。With the opening of the era of multi-messenger astronomy, there has been a surge of experimental information on neutron stars which provide the most stringent observational constraints on underlying equation of state. These discoveries provide robust restriction for the theory of exotic dense matter as well. In this context, the hyperon-Δ admixed compact star model appears as a very promising model. In this work, a set of hyperon-Δ mixed equation of state derived from covariant density functional theory are used to explore the static properties of traditional and hyperon-Δ admixed neutron stars. The similarities and differences among the mass and radius, moment of inertia, and tidal deformability for stars with different matter-phase are figured out. It is found that non-nucleon degrees of freedom significantly reduce the maximum mass, moment of inertia, and tidal deformability of neutron stars.

关 键 词：中子星 状态方程 非核子自由度 

分 类 号：P14[天文地球—天体物理]