电子朗道能级稳定性系数及应用于强磁化的中子星  

Landau level stability coefficient of electrons and its applications to strongly magnetized neutron stars

作　　者：谭俊 赵新军 高志福[4] TAN Jun;ZHAO Xin-jun;GAO Zhi-fu(School of Mathematics and Information Technology,Yuncheng University,Yuncheng 044000,Shanxi,China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters,College of Physical Science and Technology,Yili Normal University,Yining 835000,Xinjiang,China;Laboratory of Micro-Nano Electro Biosensors and Bionic Devices,Yili Normal University,Yining 835000,Xinjiang,China;Xinjiang Astronomical Observatory,CAS,Urumqi 830011,Xinjiang,China)

机构地区：[1]运城学院数学与信息技术学院,山西运城044000 [2]伊犁师范大学物理科学与技术学院,新疆凝聚态相变与微结构实验室,新疆伊宁835000 [3]伊犁师范大学微纳电传感器技术与仿生器械实验室,新疆伊宁835000 [4]中国科学院新疆天文台,新疆乌鲁木齐830011

出　　处：《云南大学学报（自然科学版）》2023年第6期1249-1259,共11页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(12041304);山西省自然科学基金(20210302123083);伊犁师范大学科研创新团队培育计划(CXZK20210220).

摘　　要：首先通过引入电子朗道能级稳定性系数g_(n)和Dirac-δ函数,给出在超强磁场下相对论电子压强pe的表达式.然后,讨论了中子星内部超强磁场的量子电动力学效应.最后,选择中子星的外壳层晶格物质和外核中理想的n-p-e(中子−质子−电子)物质系统为代表,讨论了超强磁场对物态方程的影响效应,研究发现,在中子星“中子滴出密度”以下的晶格物质中,核素(A,Z)转化为核素(A′,Z′)时发生相变,超强磁场会使相变发生在较低的物质密度区域,理想的n-p-e物质总的压强随磁场强度的增加而增大.In this paper,we firstly deduced a modified formula for pressure of relativistic electrons in superhigh magnetic fields(SMFs)by introducing the electron Landau level stability coefficient g_(n) and the Dirac-δfunction.Then we discuss the quantum electrodynamics effects of SMFs on the phase space,spin polarization and paramagnetic magnetization of electron gas in strongly magnetized neutron stars.Finally,the lattice mater below the"neutron drop density"in the crust and the ideal n-p-e system in the outer core of neutron stars are selected as representatives,and the effects of SMFs on the equation of state are discussed in detail.It is shown that when the nuclide(A,Z)is converted to(A′,Z′)in the lattice below the"neutron drip-out density"in the neutron star outer crust,the phase transition will occur in a lower density due to the SMF effects,and the total pressure of an ideal np-e system will increase with the increase of the magnetic field strength.

关 键 词：朗道能级稳定性系数 Dirac-δ函数 电子压强 磁星 

分 类 号：P144[天文地球—天体物理]