Emergence of magnetic field due to spin-polarized baryon matter in neutron stars

Details Emergence of magnetic field due to spin-polarized baryon matter in neutron stars Emergence of magnetic field due to spin-polarized baryon matter in neutron stars

1999-07-28

arxiv.org/abs/astro-ph/9907393v1

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, MNRAS in press

Scientific paper

10.1046/j.1365-8711.1999.02655.x

A model of the ferromagnetic origin of magnetic fields of neutron stars is considered. In this model, the magnetic phase transition occurs inside the core of neutron stars soon after formation. However, owing to the high electrical conductivity the core magnetic field is initially fully screened. We study how this magnetic field emerges for an outside observer. After some time, the induced field that screens the ferromagnetic field decays enough to uncover a detectable fraction of the ferromagnetic field. We conjecture that weak fields of millisecond pulsars of 10^8-10^9 G could be identified with ferromagnetic fields of unshielded fraction f=10^-4 resulting from the decay of screening fields by a factor 1-f in 10^8 yr since their birth.

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