Neutron star dynamics under time dependent external torques

Abstract

The two component model describes neutron star dynamics incorporating the response of the superfluid interior. Conventional solutions and applications involve constant external torques, as appropriate for radio pulsars on dynamical timescales. We present the general solution of two component dynamics under arbitrary time dependent external torques, with internal torques that are linear in the rotation rates, or with the extremely non-linear internal torques due to vortex creep. The two-component model incorporating the response of linear or nonlinear internal torques can now be applied not only to radio pulsars but also to magnetars and to neutron stars in binary systems, with strong observed variability and noise in the spin-down or spin-up rates. Our results allow the extraction of the time dependent external torques from the observed spin-down (or spin-up) time series, $\dot{\Omega }(t)$. Applications are discussed.

Accepted by MNRAS

References in corpus (7)

• Switched magnetospheric regulation of pulsar spin-down
• Neutron conduction in the inner crust of a neutron star in the framework of the band theory of solids
• Detection of 107 glitches in 36 southern pulsars
• A Magnetar-like Outburst from a High-B Radio Pulsar
• Vortex Creep Against Toroidal Flux Lines, Crustal Entrainment, and Pulsar Glitches
• Peculiar Glitch of PSR J1119-6127 and Extension of the Vortex Creep Model
• Microscopic Vortex Velocity in the Inner Crust and Outer Core of Neutron Stars

Cited by in corpus (1)

• Neutron Star Dynamics under Time Dependent External Torques