安庆师范大学学报（自然科学版）2026，Vol.32Issue(1)：39-43,94,6.DOI:10.13757/j.cnki.cn34-1328/n.2026.01.007
基于回旋吸收线的演化规律以限制中子星参数
Constrain Neutron Star Parameters Based on the Evolution of Absorption Lines
摘要
Abstract
A specific absorption feature that exhibited in the spectra of X-ray pulsars is referred to as the cyclotron absorp-tion line in astronomical observationally.The line energy is positively or negatively correlated with the X-ray luminosity if the luminosity is higher than a few times 1036 erg/s.According to the model of BECKER,these correlations are determined by dif-ferent physics in the line-formation region,which are dominated by Compton scattering and radiation pressure,respectively.By adopting observational data in the subcritical regime,the mass,radius,and surface magnetic field are estimated by means of model functions,involving gravitational redshift.The estimated masses for Vela X-1,GX 304-1 and Her X-1 are in the range of 1.5～2.2 M⊙,1.0～2.0 M⊙and 0.8～1.6 M⊙,respectively,and the corresponding radii are 6～14 km,8～16 km and 6～18 km.The measured surface fields are approximately 2.6×108 T,5.5×108 T and 3.9×108 T for three sources,respectively.Due to gravitational redshift,the observed fields appear weaker than their actual fields.That is,some objects classified as ordinary X-ray pulsars may actually be magnetars.Therefore,precise measurements of neutron star parameters is crucial to revealing their true physical nature.关键词
X射线双星/脉冲星/吸积盘/磁场/辐射机制Key words
X-rays binaries/pulsars/accretion disks/magnetic field/radiation mechanisms分类
天文与地球科学引用本文复制引用
何弘宇,刘佰生..基于回旋吸收线的演化规律以限制中子星参数[J].安庆师范大学学报（自然科学版）,2026,32(1):39-43,94,6.基金项目
安徽省高等学校自然科学研究项目(KJ2020A0504) （KJ2020A0504）
