核物质参数对中子星结构和冷却性质影响的研究

发布时间：2018-05-15 10:36

本文选题：中子星 + 核物质参数组　；参考：《渤海大学》2014年硕士论文

【摘要】：近几十年来，中子星一直是天体物理、粒子物理，以及核物理领域学者们研究的热门课题。目前，观测到的脉冲星已经达到两千多颗，这为中子星的理论研究提供了丰富的观测数据。当前对中子星的研究工作可分为四个方面，分别是中子星冷却性质的研究、中子星内部结构的研究、中子星磁场方面的研究以及动力学方面的研究。对于中子星的研究，很多物理学家已经做了大量工作，并且也有了很大进展。但是，目前对于中子星的物质组成、冷却性质等仍无定论，中子星的众多谜团尚未解开。本文采用的理论是相对论平均场理论和相关的弱作用理论，通过GM1、GPS250以及NL-SH参数组来研究中子星的物质组成、结构以及中微子发射率、发光度等性质。本文共分为五个部分。第一部分介绍中子星的研究历史，国内外目前的研究现状以及星体的结构性质和研究意义。第二部分给出相对论平均场理论以及常用的参数组。第三部分分别采用GM1、GPS250和NL-SH三组参数，，计算中子星物质的介子势、状态方程（EOS）以及中子星的质量-半径关系等。第四部分给出中子星的冷却理论，在不同的参数下计算中微子发射率、星体发光度及冷却曲线等，并且把不同质量、不同参数下算得的中子星的冷却性质进行对比研究。第五部分给出结论。笼统地说，GPS250参数下算得的中子星冷却速度较快，并且星体质量对冷却速度的影响相对明显。
[Abstract]:In recent decades, neutron stars have been a hot topic in astrophysics, particle physics and nuclear physics. At present, more than 2,000 pulsars have been observed, which provides abundant observation data for the theoretical study of neutron stars. The current research work on neutron star can be divided into four aspects, namely, the study of the cooling property of the neutron star, the study of the inner structure of the neutron star, the study of the magnetic field of the neutron star and the study of the dynamics of the neutron star. Many physicists have done a lot of work and made great progress on neutron stars. However, the composition and cooling properties of neutron stars are still unknown, and many mysteries of neutron stars have not been solved. The theory used in this paper is the relativistic mean field theory and the related weak action theory. The composition, structure, neutrino emissivity and luminosity of neutron star are studied by GM1GPS250 and NL-SH parameter set. This paper is divided into five parts. The first part introduces the history of neutron stars, the current research situation at home and abroad, the structure, properties and significance of stars. In the second part, the relativistic mean field theory and the commonly used parameter sets are given. In the third part, the meson potential, the equation of state (EOS) and the mass-radius relation of neutron star are calculated by using GM1GPS250 and NL-SH respectively. In the fourth part, the cooling theory of neutron star is given. The neutrino emissivity, star luminosity and cooling curve are calculated under different parameters, and the cooling properties of neutron star with different mass and different parameters are compared and studied. The fifth part gives the conclusion. In general, the cooling rate of neutron stars calculated under the parameters of GPS250 is relatively fast, and the effect of star mass on cooling rate is relatively obvious.
【学位授予单位】：渤海大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P145.6

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