Skip to main content
Article thumbnail
Location of Repository

Quasi-periodic modulation of solar and stellar flaring emission by magnetohydrodynamic oscillations in a nearby loop

By V. M. (Valery M.) Nakariakov, C. (Claire) Foullon, E. (Erwin) Verwichte and N. P. Young


We propose a new model for quasi-periodic modulation of solar and stellar flaring emission. Fast magnetoacoustic oscillations of a non-flaring loop can interact with a nearby flaring active region. This interaction occurs when part of the oscillation situated outside the loop reaches the regions of steep gradients in magnetic field within an active region and produces periodic variations of electric\ud current density. The modulation depth of these variations is a few orders of magnitude greater than the amplitude of the driving oscillation. The variations of the current can induce current-driven plasma micro-instabilities and thus anomalous resistivity. This can periodically trigger magnetic reconnection, and hence acceleration of charged particles, producing quasi-periodic pulsations of X-ray,\ud optical and radio emission at the arcade footpoints

Topics: QB
Publisher: EDP Sciences
Year: 2006
OAI identifier:

Suggested articles


  1. (2001). Physics of the Solar Corona (Berlin: doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.