What magnetar seismology can teach us about magnetic fields

Rashid Shaisultanov; David Eichler

doi:10.1088/0004-637X/702/1/L23

What magnetar seismology can teach us about magnetic fields

Rashid Shaisultanov, David Eichler

Department of Physics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

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 & Watts is magnetic splitting of degenerate toroidal modes, and we estimate a corresponding crustal magnetic field on the order of 10¹⁵ 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.

Original language	English
Pages (from-to)	L23-L26
Journal	Astrophysical Journal
Volume	702
Issue number	1 PART 2
DOIs	https://doi.org/10.1088/0004-637X/702/1/L23
State	Published - 1 Jan 2009

Keywords

Pulsars: general
Stars: magnetic fields
Stars: neutron
Stars: oscillations (including pulsations)
X-rays: stars

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/702/1/L23

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title = "What magnetar seismology can teach us about magnetic fields",

abstract = "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 & Watts is magnetic splitting of degenerate toroidal modes, and we estimate a corresponding crustal magnetic field on the order of 1015 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.",

keywords = "Pulsars: general, Stars: magnetic fields, Stars: neutron, Stars: oscillations (including pulsations), X-rays: stars",

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T1 - What magnetar seismology can teach us about magnetic fields

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AU - Eichler, David

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N2 - 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 & Watts is magnetic splitting of degenerate toroidal modes, and we estimate a corresponding crustal magnetic field on the order of 1015 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.

AB - 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 & Watts is magnetic splitting of degenerate toroidal modes, and we estimate a corresponding crustal magnetic field on the order of 1015 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.

KW - Pulsars: general

KW - Stars: magnetic fields

KW - Stars: neutron

KW - Stars: oscillations (including pulsations)

KW - X-rays: stars

UR - http://www.scopus.com/inward/record.url?scp=77949496172&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/702/1/L23

DO - 10.1088/0004-637X/702/1/L23

M3 - Article

AN - SCOPUS:77949496172

SN - 0004-637X

VL - 702

SP - L23-L26

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 2

ER -

What magnetar seismology can teach us about magnetic fields

Abstract

Keywords

ASJC Scopus subject areas

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