1210.6480 (Caroline D'Angelo)

Quasi-Periodic Oscillations in magnetars: linking variability and emission    [PDF]

Caroline D'Angelo

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.

View original: http://arxiv.org/abs/1210.6480