超子耦合参数对前身中子星引力红移的影响(英文)  

The influence of the hyperon coupling constants on the gravitational redshift of a proto neutron star

作　　者：赵先锋[1] 

机构地区：[1]滁州学院电子信息工程系,滁州239000

出　　处：《四川大学学报（自然科学版）》2011年第4期865-868,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：安徽省高校省级自然科学研究项目(KJ2009B106);滁州学院博士科研启动基金资助

摘　　要：利用相对论平均场理论,考虑重子八重态{n,p,Λ,∑^-,∑~0,∑~0,Ξ^-,Ξ~0},研究了超子耦合参数对前身中子星引力红移的影响.研究发现:作为中心能量密度函数的引力红移随中心能量密度的增大而增大,并且它对超子耦合参数较敏感.对于不考虑超子的情形,引力红移最大.同时作为质量函数的引力红移对超子耦合参数也较敏感;我们的计算结果间接地被证明与天文观测相符.研究还发现,作为M/R函数的引力红移对超子耦合参数不敏感.The influence of the hyperon coupling constants on the gravitational redshift of a proto neutron star has been investigated within the framework of relativistic mean field theory for the baryon octet {n, p, A, ∑^- , ∑^0,∑^＋ ,E^- , E^0 } system. It is found that the gravitational redshift as a function of central energy density raise with the central energy density increasing and it is sensitive to the hyperon coupling constants. For the case of no hyperons, the gravitational redshift is the largest. Simultaneously, the gravi tational redshift as a function of the mass is also sensitive to the hyperon coupling constants and our resuits are indirectly proved to be keeping with the observational data. It is also found that the gravitational redshift as a function of M/R are not sensitive to the hyperon coupling constants.

关 键 词：引力红移 超子耦合参数 相对论平均场理论 前身中子星 

分 类 号：O572.2[理学—粒子物理与原子核物理]