Cooling of Hyperonic Neutron Stars with Antikaons  

作　　者：DING Wen-Bo YU Zi LIU Yu-Hui 丁文波;喻孜;刘玉会(School of Mathematics and Physics,Bohai University,Jinzhou 121000;College of Science,Nanjing Forestry University,Nanjing 210037)

机构地区：[1]School of Mathematics and Physics,Bohai University,Jinzhou 121000 [2]College of Science,Nanjing Forestry University,Nanjing 210037

出　　处：《Chinese Physics Letters》2011年第7期85-88,共4页中国物理快报（英文版）

摘　　要：We discuss the impact of hyperons on the neutrino emitting and the gross cooling features of neutron stars with K−and K0 condensations.The results show that hyperons change the density ranges of the direct Urca process with nucleons and the Urca processes of K−and K0 condensations,as well as the values of neutrino emissivity.Moreover,interactions between hyperons and antikaons make the neutrino luminosity complicated.It is found that various hyperons play different roles in neutron stars.For massive stars,Σhyperons make the cooling slower.However,Λcan hardly change the cooling history but it reduces the mass of neutron stars.

关 键 词：CONDENSATION SLOWER STARS 

分 类 号：O57[理学—粒子物理与原子核物理]