Direct Urca Processes with Hyperons in Cooling Neutron Stars

作     者：XU Yan LIU Guang-Zhou WU Yao-Rui ZHU Ming-Feng YU Zi WANG Hong-Yan ZHAO En-Guang 许妍;刘广洲;吴姚睿;朱明枫;喻孜;王红岩;赵恩广

作者机构：Center for Theoretical PhysicsJilin UniversityChangchun 130012 College of ScienceNanjing Forestry UniversityNanjing 210037 Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2011年第28卷第7期

页      面：334-337页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：by the National Natural Science Foundation of China under Grant Nos 10675024 and 11075063 the National Fundamental Project for Subsidy Funds of Personnel Training J0730311 

主　　题：processes relativistic sharply 

摘      要：In the relativistic mean field approximation,the relativistic energy losses of the direct Urca processes with nucleons(N-DURCA)and hyperons(Y-DURCA)are studied in the degenerate baryon matter of neutron *** investigate the effects of hyperon degrees of freedom and the Y-DURCA processes on the N-DURCA processes,and the total neutrino emissivity of neutron star *** results show that the existence of hyperons decreases the abundance of protons and leptons,and can sharply suppress the neutrino emissivity of the N-DURCA processes.