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General Relativity and Quantum Cosmology

arXiv:0711.1518 (gr-qc)
[Submitted on 9 Nov 2007 (v1), last revised 3 Oct 2008 (this version, v2)]

Title:Constraints on the Magnetic Field Geometry of Magnetars

Authors:H. Sotani, A. Colaiuda, K. D. Kokkotas
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Abstract: We study the effect of the magnetic field geometry on the oscillation spectra of strongly magnetized stars. The magnetic field distributions include both toroidal and poloidal contributions. We observe that the toroidal contribution does not influence significantly the torsional oscillations of the crust. Moreover, in the case that the core is a type I supercontactor and the magnetic fields are confined in the crust, the torsional oscillation spectrum is drastically affected by the presence of the strong magnetic fields. Comparison with results and estimations for the magnetic field strength, from observations, exclude the possibility that magnetars will have a magnetic field solely confined in the crust i.e. our results suggest that the magnetic field in whatever geometry has to permeate the whole star.
Comments: 5 pages, 5 figures
Subjects: General Relativity and Quantum Cosmology (gr-qc); Astrophysics (astro-ph)
Cite as: arXiv:0711.1518 [gr-qc]
  (or arXiv:0711.1518v2 [gr-qc] for this version)
  https://doi.org/10.48550/arXiv.0711.1518
Journal reference: Mon.Not.Roy.Astron.Soc.385:2161,2008
Related DOI: https://doi.org/10.1111/j.1365-2966.2008.12977.x

Submission history

From: Hajime Sotani [view email]
[v1] Fri, 9 Nov 2007 18:09:18 UTC (391 KB)
[v2] Fri, 3 Oct 2008 13:52:35 UTC (391 KB)
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