Probing the Internal Physics of Neutron Stars through the Observed Braking Indices and Magnetic Tilt Angles of Several Young Pulsars  

作　　者：Fang-Yuan Hu Quan Cheng Xiao-Ping Zheng Jia-Qian Wang Yu-Long Yan Jia-Yu Wang Tian-Yu Luo 

机构地区：[1]Institute of Astrophysics,Central China Normal University,Wuhan 430079,China

出　　处：《Research in Astronomy and Astrophysics》2023年第5期221-229,共9页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12003009,and 12033001);CAS“Light of West China”Program(Grant No.2019-XBQNXZ-B-016);the National SKA program of China(Grant No.2020SKA0120300)。

摘　　要：The braking indices of pulsars may contain important information about the internal physics of neutron stars(NSs),such as neutron superfluidity and internal magnetic fields.As a subsequent paper of Cheng et al.,we perform the same analysis as that done in the previous paper to other young pulsars with a steady braking index,n.Combining the timing data of these pulsars with the theory of magnetic field decay,and using their measured magnetic tilt angles,we can set constraints on the number of precession cycles,ξ,which represents the interactions between superfluid neutrons and other particles in the NS interior.For the pulsars considered in this paper,the results show thatξis within the range of a few×10~3 to a few×10~6.Interestingly,for the Crab and Vela pulsars,the constraints onξobtained with our method are generally consistent with that derived from modeling of the glitch rise behaviors of the two pulsars.Furthermore,we find that the internal magnetic fields of pulsar with n<3 may be dominated by the toroidal components.Our results may not only help to understand the interactions between the superfluid neutrons and other particles in the interior of NSs but also be important for the study of continuous gravitational waves from pulsars.

关 键 词：STARS neutron-(stars:)pulsars general-stars magnetic field-gravitational waves 

分 类 号：P145.6[天文地球—天体物理]