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

doi:10.1088/1674-1056/22/8/080401

中国物理B ›› 2013, Vol. 22 ›› Issue (8): 80401-080401.doi: 10.1088/1674-1056/22/8/080401

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

文德华, 周颖

Department of Physics, South China University of Technology, Guangzhou 510641, China

收稿日期:2012-11-28 修回日期:2013-02-26 出版日期:2013-06-27 发布日期:2013-06-27
基金资助:
Project 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), and sponsored by SRF for ROCS, SEM. This research has made use of NASA's Astrophysics Data System.

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

Wen De-Hua (文德华), Zhou Ying (周颖)

Department of Physics, South China University of Technology, Guangzhou 510641, China

Received:2012-11-28 Revised:2013-02-26 Online:2013-06-27 Published:2013-06-27
Contact: Wen De-Hua E-mail:wendehua@scut.edu.cn
Supported by:
Project 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), and sponsored by SRF for ROCS, SEM. This research has made use of NASA's Astrophysics Data System.

摘要/Abstract

摘要： The impact of symmetry energy slope L on the axial w-mode oscillations is explored, where the range of the constrained 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 w_I-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

Abstract: The impact of symmetry energy slope L on the axial w-mode oscillations is explored, where the range of the constrained 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 w_I-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.

Key words: symmetry energy, neutron star, oscillation

中图分类号: (Relativistic stars: structure, stability, and oscillations)

04.40.Dg

26.60.-c (Nuclear matter aspects of neutron stars) 97.60.Jd (Neutron stars)

文德华, 周颖. Effects of the symmetry energy slope on the axial oscillations of neutron stars[J]. 中国物理B, 2013, 22(8): 80401-080401.

Wen De-Hua (文德华), Zhou Ying (周颖). Effects of the symmetry energy slope on the axial oscillations of neutron stars[J]. Chin. Phys. B, 2013, 22(8): 80401-080401.

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

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

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