Effects of the symmetry energy slope on the axial oscillations of neutron stars  

作　　者：文德华 周颖 

机构地区：[1]Department of Physics, South China University of Technology

出　　处：《Chinese Physics B》2013年第8期298-301,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.10947023 and 11275073);the Fundamental Research Funds for the Central Universities(Grant No.2012ZZ0079);sponsored by SRF for ROCS,SEM

摘　　要：The impact of symmetry energy slope L on the axial w-mode oscillations is explored, where the range of the con- strained slope L of symmetry energy at saturation density is adopted from 25 MeV to 115 MeV while keeping the equation of state （EOS） of symmetric nuclear matter fixed. Based on the range of the symmetry energy slope, a constraint on the frequency and damping time of the wi-mode of the neutron star is given. It is found that there is a perfect linear relation between the frequency and the stellar mass for a fixed slope L, and the softer symmetry energy corresponds to a higher frequency. Moreover, it is confirmed that both the frequencies and damping times have a perfect universal scaling behavior for the EOSs with different symmetry energy slopes at saturation density.The impact of symmetry energy slope L on the axial w-mode oscillations is explored, where the range of the con- strained slope L of symmetry energy at saturation density is adopted from 25 MeV to 115 MeV while keeping the equation of state （EOS） of symmetric nuclear matter fixed. Based on the range of the symmetry energy slope, a constraint on the frequency and damping time of the wi-mode of the neutron star is given. It is found that there is a perfect linear relation between the frequency and the stellar mass for a fixed slope L, and the softer symmetry energy corresponds to a higher frequency. Moreover, it is confirmed that both the frequencies and damping times have a perfect universal scaling behavior for the EOSs with different symmetry energy slopes at saturation density.

关 键 词：symmetry energy neutron star OSCILLATION 

分 类 号：P145.6[天文地球—天体物理]