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Magnetic collapse of a neutron gas: Can magnetars indeed be formed?

  • A. Pérez Martínez
  • H. Pérez Rojas
  • H. J. Mosquera Cuesta
Theoretical Physics

Abstract.

A relativistic degenerate neutron gas in equilibrium with a background of electrons and protons in a magnetic field exerts its pressure anisotropically, having a smaller value perpendicular to than along the magnetic field. For critical fields the magnetic pressure may produce the vanishing of the equatorial pressure of the neutron gas. Taking this as a model for neutron stars, the outcome could be a transverse collapse of the star. This fixes a limit to the fields to be observable in stable neutron star pulsars as a function of their density. The final structure left over after the implosion might be a mixed phase of nucleons and a meson condensate, a strange star, or a highly distorted black hole or black ”cigar”, but not a magnetar, if viewed as a superstrongly magnetized neutron star. However, we do not exclude the possibility of superstrong magnetic fields arising in supernova explosions which lead directly to strange stars. In other words, if any magnetars exist, they cannot be neutron stars.

Keywords

Magnetic Field Black Hole Neutron Star Critical Field Mixed Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2003

Authors and Affiliations

  • A. Pérez Martínez
    • 1
  • H. Pérez Rojas
    • 1
  • H. J. Mosquera Cuesta
    • 2
  1. 1.Grupo de Física Teórica, ICIMAF, Calle E No. 309, 10400 La Habana, Cuba CU
  2. 2. Abdus Salam International Centre for Theoretical Physics, P.O. Box 586, Strada Costiera 11, Miramare 34100, Trieste, Italy IT

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