Neutron star dynamics under time-dependent external torques

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Gügercinoğlu, Erbil and Alpar, M. Ali (2017) Neutron star dynamics under time-dependent external torques. Monthly Notices of the Royal Astronomical Society, 471 (4). pp. 4827-4831. ISSN 0035-8711 (Print) 1365-2966 (Online) Published Online First http://dx.doi.org/10.1093/mnras/stx1937

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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 time-scales. 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. Applications are discussed.
Item Type: Article
Uncontrolled Keywords: stars: magnetars – stars: neutron, pulsars: general, X-rays: binaries
Subjects: Q Science > QB Astronomy > QB460-466 Astrophysics
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: Erbil Gügercinoğlu
Date Deposited: 07 Sep 2017 15:02
Last Modified: 07 Sep 2017 15:02
URI: https://research.sabanciuniv.edu/id/eprint/33624

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