Journal article

Stability of interlinked neutron vortex and proton flux-tube arrays in a neutron star - II. Far-from-equilibrium dynamics

LV Drummond, A Melatos

Monthly Notices of the Royal Astronomical Society | Oxford University Press (OUP) | Published : 2018

Abstract

The equilibrium configurations of neutron superfluid vortices interacting with proton superconductor flux tubes in a rotating, harmonic trap are non-trivial in general, when the magnetorotational symmetry is broken. A non-zero angle θ between the magnetic and rotation axes leads to tangled vorticity due to competition between vortex-vortex repulsion and vortex-flux-tube pinning. Here, we investigate the far-from-equilibrium behaviour of the vortices, as the trap decelerates, by solving the time-dependent, stochastic, Gross-Pitaevskii equation numerically in three dimensions. The numerical simulations reveal new vortex behaviours. Key geometrical attributes of the evolving vortex tangle are c..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council through Centre of Excellence for Gravitational Wave Discovery (OzGrav)


Funding Acknowledgements

Simulations were conducted using the Multi-modal Australian ScienceS Imaging and Visualisation Environment (MASSIVE)<SUP>4</SUP> at Monash University with access provided by a National Computational Infrastructure Merit Allocation Scheme grant. The project was supported by the Australian Research Council through a Discovery Project grant and the Centre of Excellence for Gravitational Wave Discovery (OzGrav; CE170100004).