Magnetar Outbursts from Avalanches of Hall Waves and Crustal Failures

Abstract

We explore the interaction between Hall waves and mechanical failures inside a magnetar crust, using detailed one-dimentional models that consider temperature-sensitive plastic flow, heat transport and cooling by neutrino emission, as well as the coupling of the crustal motion to the magnetosphere. We find that the dynamics is enriched and accelerated by the fast, short-wavelength Hall waves that are emitted by each failure. The waves propagate and cause failures elsewhere, triggering avalanches. We argue that these avalanches are the likely sources of outbursts in transient magnetars.

12 pages, 15 figures, accepted for publication in ApJ

References in corpus (17)

• The strongest cosmic magnets: Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
• The Breaking Strain of Neutron Star Crust and Gravitational Waves
• Corona of Magnetars
• Untwisting magnetospheres of neutron stars
• Torsional Oscillations of Relativistic Stars with Dipole Magnetic Fields
• A Swift gaze into the 2006 March 29th burst forest of SGR 1900+14
• Three-dimensional simulations of the magnetic stress in a neutron star crust
• Magnetic field evolution in magnetar crusts through three dimensional simulations
• Timing and Flux Evolution of the Galactic Center Magnetar SGR J1745-2900
• The Anatomy of a Magnetar: XMM Monitoring of the Transient Anomalous X-ray Pulsar XTE J1810-197
• Thermoplastic waves in magnetars
• Hall drift and the braking indices of young pulsars
• Magnetars as cooling neutron stars with internal heating
• X-ray and Near-IR Variability of the Anomalous X-ray Pulsar 1E 1048.1-5937: From Quiescence Back to Activity
• Thermal emission of neutron stars with internal heaters
• Magnetar activity mediated by plastic deformations of neutron star crust
• Density-shear instability in electron MHD

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