Vortices and type-I superconductivity in neutron stars

Abstract

In a recent paper by Link, it was pointed out that the the standard picture of the neutron star core, composed of a mixture of a neutron superfluid and a proton type-II superconductor, is inconsistent with observations of long period precession in isolated pulsars. In the following we will show that intervortex force between the magnetic flux tubes may be attractive resulting in a type-I (rather than type-II) superconductor. In this case the magnetic field cannot exist in the form of magnetic flux tubes, supporting Link's observation. This behavior of the system is due to the strong interaction between the proton-neutron Cooper pairs, which was previously ignored. We also calculate the critical magnetic fields H_c and H_c2 for type-I/II superconductors. These results also support our claim of type-I superconductivity in the cores of neutron stars.

arXiv comment10 pages, 1 figure

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• The dynamics of dissipative multi-fluid neutron star cores
• Critical magnetic fields in a superconductor coupled to a superfluid
• Unconventional rotational responses of hadronic superfluids in a neutron star caused by strong entrainment and a ${\Sigma }^{-}$ hyperon gap
• Stable Cosmic Vortons
• A Novel Mechanism for Type-I Superconductivity in Neutron Stars
• Gravitationally bound BCS state as dark matter
• Isospin asymmetry and type-I superconductivity in neutron star matter
• Vortex Rings in two Component Bose-Einstein Condensates
• Equilibrium intermediate-state patterns in a type-I superconducting slab in an arbitrarily oriented applied magnetic field
• Stability of interlinked neutron vortex and proton flux-tube arrays in a neutron star -- III. Proton feedback
• Proposed method to realize the $p$-wave superfluid state using a $s$-wave superfluid Fermi gas with a synthetic spin-orbit interaction
• The spin evolution of neutron stars with the superfluid core
• Novel effects of electromagnetic interaction on the correlation of nucleons in nuclear matter
• Topological aspects in a two component Bose condensed system in neutron star
• Surface energy of magnetized superconducting matter in the neutron star cores
• The Cause of a Pulsar Glitch
• Contrasting confinement in superQCD and superconductors
• Multicomponent Superfluids and Superconductors in Dense Nuclear and Quark Matter