Thermodynamics of superfluid solutions in the npe phase of a neutron star

Astronomy and Astrophysics – Astrophysics

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Magnetohydrodynamics, Neutron Stars, Rotating Fluids, Stellar Rotation, Superfluidity, Magnetic Moments, Stellar Magnetic Fields, Vortices

Scientific paper

The thermodynamics of a rotating superfluid solution in the npe phase of a neutron star is considered in the London approximation. The drag of the superfluid protons by the rotating superfluid neutrons leads to the formation of a system of neutron filaments with fluxes Phi(1). The inhomogeneous magnetic field produced by this system leads when H is greater than Hc1 to the appearance of an inhomogeneous vortex lattice of the protons that are not entrained with fluxes Phi(0). The magnetic moment of the star due to this lattice is of order 10 to the 31st G cu cm. Equations are obtained that determine the distribution of the magnetic induction and the mean macroscopic velocity of the superfluid neutrons. The conditions of occurrence of neutron and proton vortex filaments are also considered.

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