Convection in protoneutron stars and the structure of surface magnetic fields in pulsars

Abstract

We consider generation and evolution of small-scale magnetic fields in neutron stars. These fields can be generated by small-scale turbulent dynamo action soon after the collapse when the proto-neutron star is subject to convective and neutron finger instabilities. After instabilities stop, small-scale fields should be frozen into the crust that forms initially at high density about 10^{14} g/cm^{3} and then spreads to the surface. Because of high crustal conductivity, magnetic fields with the lengthscale about 1-3 km can survive in the crust as long as 10-100 Myr and form a sunspot-like structure at the surface of radiopulsars.

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• Neutron star magnetic field evolution, crust movement and glitches
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Cited by in corpus (24)

• The bottom magnetic field and magnetosphere evolution of neutron star in low mass X-ray binary
• Unveiling the thermal and magnetic map of neutron star surfaces though their X-ray emission: method and lightcurves analysis
• On the origins of part-time radio pulsars
• Unraveling the drift behaviour of the remarkable pulsar PSR B0826-34
• Protoneutron star dynamos and pulsar magnetism
• Protoneutron star dynamos: pulsars, magnetars, and radio-silent X-ray emitting neutron stars
• On the Apparent Nulls and Extreme Variability of PSR J1107-5907
• The influence of nondipolar magnetic field and neutron star precession on braking indexes of radiopulsars
• Formation of a Partially-Screened Inner Acceleration Region in Radio Pulsars: Drifting Subpulses and Thermal X-Ray Emission from Polar Cap Surface
• The neutron star in Cassiopeia A: equation of state, superfluidity, and Joule heating
• Long-term Radio Observations of the Intermittent Pulsar B1931+24
• On the Pulse Intensity Modulation of PSR B0823+26
• Stability of the toroidal magnetic field in stellar radiation zones
• The proto--neutron--star dynamo -- viability and impediments
• The magnetic structure of neutron stars and their surface-to-core temperature relation
• Joule heating in high magnetic field pulsars
• Interrelation between radio and X-ray signatures of drifting subpulses in pulsars
• The birth of strange stars: kinetics, hydrodynamics and phenomenology of supernovae and GRBs
• Explaining the subpulse drift velocity of pulsar magnetosphere within the space-charge limited flow model
• Magnetohydrodynamic waves in the pulsar magnetosphere
• Stability of the toroidal magnetic field in rotating stars
• The spin evolution of neutron stars with the superfluid core
• Force-free pulsar magnetosphere: instability and generation of MHD waves
• Instabilities, turbulence, and mixing in the ocean of accreting neutron stars