WHAT MAGNETAR SEISMOLOGY CAN TEACH US ABOUT MAGNETIC FIELDS
Journal Article
·
· Astrophysical Journal (Online)
- Physics Department, Ben-Gurion University, Be'er-Sheva 84105 (Israel)
The effect of magnetic fields on the frequencies of toroidal oscillations of neutron stars is derived to lowest order. We suggest that the fine structure in the quasiperiodic oscillation power spectrum of magnetars following giant flares reported by Strohmayer and Watts is magnetic splitting of degenerate toroidal modes, and we estimate a corresponding crustal magnetic field on the order of 10{sup 15} Gauss or more. We suggest that residual m, -m symmetry following such splitting, together with nonaxisymmetric or rotational splitting of the residual symmetry, might allow beating of individual frequency components that is slow enough to be observed.
- OSTI ID:
- 21333819
- Journal Information:
- Astrophysical Journal (Online), Journal Name: Astrophysical Journal (Online) Journal Issue: 1 Vol. 702; ISSN 1538-4357
- Country of Publication:
- United States
- Language:
- English
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