Vortex lines in neutron star superfluids and decay of pulsar magnetic fields |
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Authors: | A. G. Muslimov A. I. Tsygan |
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Affiliation: | (1) A.F. Ioffe Physical Technical Institute, Academy of Sciences of the USSR, Leningrad, U.S.S.R. |
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Abstract: | We adopt that in the interior of neutron stars both the proton and neutron superfluids are in the vortex state. Thus, in the superconducting core the magnetic field is expected to be organized in the form of quantized fluxoids. It is shown that fluxoids are buoyant. This gives rise to a rapid ( 5×104 yr) expulsion of the magnetic field out of the superconducting core to the subcrustal region, and a subsequent decay within the outer crust. The effect considered may be the physical reason why the characteristic decay-time of pulsar magnetic fields ( 106 yr) corresponds to the ohmic dissipation time within the neutron star crust. The intersection of two types of vortex lines with each other and its possible consequence for pulsars is briefly discussed. |
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