Vortex Avalanches and Collective Motion in Neutron Stars
arXiv:2410.16878 · doi:10.3847/1538-4357/adc383
Abstract
We simulate the dynamics of about 600 quantum vortices in a spinning-down cylindrical container using a Gross--Pitaevskii model. For the first time, we find convincing spatial-temporal evidence of avalanching behaviour resulting from vortex depinning and collective motion. During a typical avalanche, about 10 to 20 vortices exit the container in a short period, producing a glitch in the superfluid angular momentum and a localised void in the vorticity. After the glitch, vortices continue to depin and circulate around the vorticity void in a similar manner to that seen in previous point-vortex simulations. We present evidence of collective vortex motion throughout this avalanche process. We also show that the effective Magnus force can be used to predict when and where avalanches will occur. Lastly, we comment on the challenge of extrapolating these results to conditions in real neutron stars, which contain many orders of magnitude more vortices.
References in corpus (25)
- Physics of Neutron Star Crusts
- Dynamics and statistical mechanics of ultra-cold Bose gases using c-field techniques
- Pulsar glitches: The crust is not enough
- Avalanche dynamics of radio pulsar glitches
- Bose-Einstein Condensation from a Rotating Thermal Cloud: Vortex Nucleation and Lattice Formation
- Gross-Pitaevskii model of pulsar glitches
- Mesoscopic pinning forces in neutron star crusts
- Neutron Stars in the Laboratory
- Vortex Creep Against Toroidal Flux Lines, Crustal Entrainment, and Pulsar Glitches
- Unpinning triggers for superfluid vortex avalanches
- Bose-Einstein condensates with a bent vortex in rotating traps
- Coherent vortex structures in quantum turbulence
- The stochastic projected Gross-Pitaevskii equation
- Vortex-nucleus interaction in the inner crust of neutron stars
- Glitches in rotating supersolids
- Stability of interlinked neutron vortex and proton flux tube arrays in a neutron star: equilibrium configurations
- Glitch time series and size distributions in eight prolific pulsars
- Observational constraints on neutron star crust-core coupling during glitches
- Core and crust contributions in pulsar glitches: constraints from the slow rise of the largest glitch observed in the Crab pulsar
- Vortex Pinning in Neutron Stars, Slip-stick Dynamics, and the Origin of Spin Glitches
- Collective, glitch-like vortex motion in a neutron star with an annular pinning barrier
- Simulating pulsar glitches: an -body solver for superfluid vortex motion in two dimensions
- Neutron-superfluid vortices and proton-superconductor flux tubes: Development of a minimal model for pulsar glitches
- Vortex depinning in a two-dimensional superfluid
- Persistent gravitational radiation from glitching pulsars. II. Updated scaling with vortex number