Neutron Star Matter Including Delta Isobars  

作　　者：LIUGuang-Zhou LIUWei ZHAOEn-Guang 

机构地区：[1]CenterforTheoreticalPhysicsandDepartmentofPhysics,JilinUniversity,Changchun130023,China [2]InstituteofTheoreticalPhysics,AcademiaSinica,P.O.Box2735,Beijing100080,China

出　　处：《Communications in Theoretical Physics》2004年第1X期99-102,共4页理论物理通讯（英文版）

基　　金：国家自然科学基金，国家重点基础研究发展计划(973计划)，中国科学院知识创新工程项目

摘　　要：In this paper a new phase structure of neutron star matter including nucleons and delta isobars is presented.Particle fractions populated and pion condensations in neutron star matter are investigated in this model. The existence of the pion condensations can postpone the appearance of delta isobars. We found that both the pion condensation and reduce of the ratio of delta isobar to nucleons couplings can soften the corresponding equation of state. The maximum masses and their corresponding radii of neutron stars are calculated, and the obtained values are in observational region.

关 键 词：中子星物质 相位结构 德耳塔等压线 天体物理学 介子浓缩 

分 类 号：P145.6[天文地球—天体物理]