Dirac star with a dipole magnetic field

Authors

  • V. Dzhunushaliev Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, Institute of Experimental and Theoretical Physics, National Nanotechnology Laboratory of Open Type, Almaty, Kazakhstan, Institute of Physical and Technical Problems and Materials Science, National Academy of Sciences of the Kyrgyz Republic, Bishkek, Kyrgyzstan
  • V. Folomeev Institute of Experimental and Theoretical Physics, Al-Farabi Kazakh National University, National Nanotechnology Laboratory of Open Type, Almaty, Kazakhstan, Institute of Physical and Technical Problems and Materials Science, National Academy of Sciences of the Kyrgyz Republic, Bishkek, Kyrgyzstan

DOI:

https://doi.org/10.26577/rcph-2019-i2-2

Keywords:

spinor fluid, compact gravitating configurations, dipole magnetic field

Abstract

Compact gravitating configurations consisting of strongly magnetized spinor fluid are studied. The latter is described by an effective equation of state which is obtained in the limit of large values of the coupling constant of a nonlinear spinor field. Regular static asymptotically flat solutions describing configurations with finite sizes (Dirac stars) are found. Mass-radius relations for stars with masses of the order of the Chandrasekhar mass and radii comparable with sizes of neutron stars are constructed. The structure of a dipole magnetic field modeled in the form of an axisymmetric poloidal magnetic field created by toroidal electric currents is investigated. The energy density of the magnetic field is assumed to be much smaller than that of the spinor fluid. The radial and tangential components of the magnetic field strength are computed. It is shown that their distributions along the radius of the configurations are similar to those of neutron stars.

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Published

2019-06-24

Issue

Vol. 69 No. 2 (2019): Recent Contributions to Physics

Section

Theoretical Physics. Nuclear and Elementary Particle Physics. Astrophysics

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