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Force on a neutron quantised vortex pinned to proton fluxoids in the superfluid core of cold neutron stars
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The superfluid and superconducting core of a cold rotating neutron star is expected to be threaded by a tremendous number of neutron quantised vortices and proton fluxoids. Their interactions are unavoidable and may have important astrophysical implications. In this paper, the various contributions to the force acting on a single vortex to which fluxoids are pinned are clarified. The general expression of the force is derived by applying the variational multifluid formalism developed by Carter and collaborators. Pinning to fluxoids leads to an additional Magnus type force due to proton circulation around the vortex. Pinning in the core of a neutron star may thus have a dramatic impact on the vortex dynamics, and therefore on the magneto-rotational evolution of the star.
Forward citations
Cited by 2 Pith papers
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Neutron contribution to the force on a proton vortex in superconducting neutron-star matter
Normal neutrons scatter off proton vortices via the spatially varying condensate momentum, producing a purely longitudinal force proportional to relative neutron-vortex velocity that vanishes without neutron-proton Fe...
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Non-purely transverse Magnus force in superconducting neutron stars
In the idealized extreme type-II limit, the force on a proton vortex core is exactly the Magnus force evaluated with a corrected local proton current, yielding a longitudinal force component usually omitted.
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