Kink waves in an active region dynamic fibril

Abstract

We present high spatial and temporal resolution Ca II 8542 observations of a kink wave in an on-disk chromospheric active region fibril. The properties of the wave are similar to those observed in off-limb spicules. From the observed phase and period of the wave we determine a lower limit for the field strength in the chromospheric active region fibril located at the edge of a sunspot to be a few hundred Gauss. We find indications that the event was triggered by a small-scale reconnection event higher up in the atmosphere.

16 pages, 6 figures. Accepted for publication in ApJ

References in corpus (4)

• Observation of kink waves in solar spicules
• Doppler shift oscillations in solar spicules
• On the solar chromosphere observed at the limb with Hinode
• On the linear coupling between fast and slow MHD waves due to line-tying effects

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