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ToolsLander, S. K., Jones, D. I. and Passamonti, A. (2010) Oscillations of rotating magnetized neutron stars with purely toroidal magnetic fields. Monthly Notices of the Royal Astronomical Society, 405 (1). pp. 318-328. ISSN 0035-8711
Full text not available from this repository.Abstract
We investigate the oscillation spectrum of rotating Newtonian neutron stars endowed with purely toroidal magnetic fields, using a time-evolution code to evolve linear perturbations in the Cowling approximation. The background star is generated by numerically solving the magnetohydrodynamics equilibrium equations and may be non-spherical by virtue of both rotation and magnetic effects; hence, our perturbations and background are fully consistent. Whilst the background field is purely toroidal, the perturbed field is mixed poloidal-toroidal. From Fourier analysis of the perturbations, we are able to identify a number of magnetically restored Alfvén (or a) modes. We show that in a rotating star pure inertial and a-modes are replaced by hybrid magneto-inertial modes, which reduce to a-modes in the non-rotating limit and inertial modes in the non-magnetic limit. We show that the r-mode instability is suppressed by magnetic fields in sufficiently slowly rotating stars. In addition, we determine magnetic frequency shifts in the f-mode. We discuss the astrophysical relevance of our results, in particular for magnetar oscillations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | mhd,stars: magnetic fields,stars: neutron,stars: oscillations,stars: rotation,astronomy and astrophysics,space and planetary science ,/dk/atira/pure/subjectarea/asjc/3100/3103 |
| Faculty \ School: | Faculty of Science > School of Mathematics |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 28 Jan 2020 03:52 |
| Last Modified: | 22 Oct 2022 05:44 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/73797 |
| DOI: | 10.1111/j.1365-2966.2010.16435.x |
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