Journal of Shanghai University(Natural Science Edition) ›› 2013, Vol. 19 ›› Issue (2): 176-180.doi: 10.3969/j.issn.1007-2861.2013.02.013

• Mathematics.Physics and Chemistry • Previous Articles     Next Articles

Quantum Vacuum Polarization Modification for Gravitational Redshift of Neutron Star Emissions

CHEN Jia-lin1, JI Pei-yong1,2   

  1. 1. College of Sciences, Shanghai University, Shanghai 200444, China; 2. The Shanghai Key Laboratory of Astrophysics, Shanghai 200234, China
  • Received:2012-04-26 Online:2013-04-30 Published:2013-04-30

Abstract: Measuring the gravitational redshift of neutron star emission lines is the most effective and feasible method for determining fundamental properties of these compact objects. It is found that redshift of emission lines of pulsars and magnetars is produced not only by the gravitational field but also by surface magnetoplasma and quantum electrodynamics (QED) vacuum polarization effect induced by the super-strong magnetic field.The effect on the stellar emission caused by magnetoplasma and quantum vacuum polarization is studied within the framework of Gordon’s effective metric theory. It is shown that modification of gravitational redshift is mainly caused by magnetoplasma, and contributions of the QED vacuum polarization effect should also be
taken into account in some particular cases.

Key words: gravitational redshift, magnetar, magnetoplasma, pulsar, quantum electrodynamics (QED)vacuum polarization effect

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