High-Quality Fast QPOs from Magnetars: An Electric Circuit Model

High-Quality Fast QPOs from Magnetars: An Electric Circuit Model

An interpretation of high-frequency (20-2400 Hz) fast quasiperiodic oscillations of magnetars in terms of an equivalent electric circuit is given. Observed periods and the very high quality of quasi-periodic oscillations are explained. The oscillation source is represented as a hot electron-positron...

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Bibliographic Details
Main Authors: Stepanov Alexander, Zaitsev Valery, Valtaoja Esko
Format: Article
Language:English
Published: De Gruyter 2011-06-01
Series:Open Astronomy
Subjects:
neutron stars
flares
pulsations
coronal loops
diagnostics
Online Access:https://doi.org/10.1515/astro-2017-0292
Description
Summary:An interpretation of high-frequency (20-2400 Hz) fast quasiperiodic oscillations of magnetars in terms of an equivalent electric circuit is given. Observed periods and the very high quality of quasi-periodic oscillations are explained. The oscillation source is represented as a hot electron-positron plasma in a ‘trapped fireball’, a system of current-carrying magnetic loops of various sizes. The physical parameters of a ‘trapped fireball’ in the flare of SGR 1806-20 (2004 December 27) are estimated.
ISSN:2543-6376

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