摘要
在相对论平均场框架内研究温度对包含δ介子的热前中子星物质的影响.温度对前中子星物质的影响趋势与是否包含δ介子无关.温度升高:(1)超子出现的临界密度降低;(2)低密度处超子丰度增加;(3)高密度区域内中微子丰度增加;(4)状态方程在低密度区域变硬而在高密度区域变软.同时,温度升高,前中子星的最大质量及其对应的半径都会增加.如果前中子星物质内包含了夸克相,温度升高,强子-夸克相变开始和结束的临界密度都会提前.
In the framework of the relativistic mean field theory, the effects of temperature on thermal protoneutron star matter including δmeson are studied. The results show that the effects of temperature on star matter are independent on the inclusion of theδmeson. As the temperature increases, （1） the threshold densities for the hyperons decrease, （2） the abundance of the hyperons at low densities increases, （3） the abundance of the neutrinos at high densities increases, （4） the equation of state becomes more stiff at high densities while softer at low densities. The increase of the temperature also results in larger maximum mass and the corresponding radius. When the hadron-quark phase transition is consid- ered, the increase of the temperature results in lower threshold densities for the mixed phase and pure quark phase.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期141-145,共5页
Journal of Sichuan University(Natural Science Edition)
基金
南京林业大学高学历人才基金(163101020号)
国家自然科学基金(11047157)
南华大学博士启动项目(2010XQD29)
