核物质对称能斜率对快转中子星性质的约束（英文）

发布时间：2018-06-22 22:47

本文选题：对称能 + 中子星　；参考：《原子核物理评论》2015年02期

【摘要】：在过去的十余年中,对非对称核物质的对称能的研究无论从实验还是理论上都取得了较大的突破,这对中子结构及其物态方程的理解具有十分重要的意义。本研究将采用一个相对保守的对称能斜率范围(25 Me VL105Me V)来研究其对快速转动中子星性质的约束,这些性质包括:质量-半径关系、转动惯量、引力红移以及转动形变等。通过该对称能斜率的约束,发现典型中子星(M=1.4M⊙)的半径约束在10.28～13.43 km范围内,这与最近的相关观测相一致。如果观察发现了质量较小的毫秒脉冲星,则将为核物质的对称能较软提供有效的证据。另外还发现,对角动量的一致性可为快转中子星转动惯量的上限提供约束。最后,根据具有低质量伴星的双星EXO0748-676的红移观测,给出了该脉冲星的质量下限(1.5M⊙)。
[Abstract]:In the past ten years, great breakthroughs have been made in the study of the symmetric energy of asymmetric nuclear matter, both experimentally and theoretically, which is of great significance to the understanding of the neutron structure and its equation of state. In this study, a relatively conservative symmetric energy slope range (25Me VL105Me V) is used to study the properties of fast rotating neutron stars. These properties include mass-radius relationship, moment of inertia, gravitational redshift and rotational deformation. By the constraint of the symmetric energy slope, it is found that the radius constraint of the typical neutron star (M _ (1.4) M _ (-) is within the range of 10.28 ~ 13.43 km, which is consistent with the recent observations. If a millisecond pulsar with small mass is observed, it will provide effective evidence for the softer symmetry energy of nuclear matter. It is also found that the consistency of angular momentum can restrict the upper limit of the moment of inertia of fast rotating neutron stars. Finally, based on the red shift observations of the binary star EXO0748-676 with low mass companion, the lower mass limit of the pulsar is given (1.5m _ _ _).
【作者单位】：华南理工大学物理系;华南理工大学数学系;
【基金】：Natural Science Foundation of China(10947023,11275073,11205061) Fundamental Research Funds for Central Universities(2013ZG0036)~~
【分类号】：P145.6

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