中子星吸积加速与引力辐射影响  

Accreting Neutron Star Acceleration and Effects of Gravitational Radiation

作　　者：付妍妍[1,2] 张月竹[1,2] 魏益焕[1] 张承民[2] 禺少华 潘元月 郭元旗 王德华[2,3] 

机构地区：[1]渤海大学数理学院物理系,锦州121000 [2]中国科学院国家天文台,北京100012 [3]贵州师范大学物理与电子科学学院,贵阳550001

出　　处：《天文学报》2015年第3期225-234,共10页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(11173034);国家重点基础研究发展计划(2012CB821800)资助

摘　　要：研究了中子星双星系统吸积过程中的中子星自旋加速,得到其周期随着吸积质量的变化关系,并且通过对中子星磁场与周期演化分析,对比脉冲星的观测,获得了理论与观测类似的结果,在此基础上,研究了引力辐射作用对中子星自旋加速过程的影响,并且推导了吸积过程中中子星自旋周期变化率,探讨了吸积与引力辐射影响相当的临界角速度Ω_(cr),评估了中子星的自旋在引力辐射下的影响.In this paper we study the neutron star＇s spin acceleration in binary systems, and the relation how the spin period changes with the accreted mass. We analyze the evolution of magnetic fields and the spin periods of neutron stars, and compare the modeled results with the observational data of pulsars, to show that they are consistent with each other. Considering the effect of gravitational radiation on the spin-up process of neutron stars, we derive the changing rate of the neutron star＇s spin periods in the accretion process. We estimate the critical angular velocity Ωcr, at which the accretion torque is balanced by that of gravitational radiation, and discuss the influence of gravitational radiation on neutron star＇s spin evolution.

关 键 词：脉冲星 普通 恒星 中子 双星 普通 X射线 双星 恒星 演化 

分 类 号：P145[天文地球—天体物理]