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Quasi-Periodic Oscillations in magnetars: linking variability and emission

Published online by Cambridge University Press:  20 March 2013

Caroline D'Angelo
Caroline D'Angelo*
Affiliation:
Instituut Anton Pannekoek, University of Amsterdam, Amsterdam, Netherlands1098 XH email: c.r.dangelo@uva.nl
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Abstract

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I present recent results studying flare emission in magnetars. Strong quasi-periodic oscillations observed in the tail of giant magnetar flares are frequently interpreted as evidence for global seismic oscillations. I demonstrate that such a global oscillation is not directly observable in the lightcurve. New work suggests the amplitude for the strongest QPO stays nearly constant in the rotation phases where it is observed, which I argue suggests it is produced by an additional emission process from the star.

Keywords

dense matterradiation mechanisms: generalmagnetic fields (magnetohydrodynamics:) MHDstars: neutronstars: oscillationsX-rays: stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 155 - 158
Copyright
Copyright © International Astronomical Union 2013

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