X-ray quasi-periodic pulsations in solar flares as magnetohydrodynamic oscillations

Foullon, C., Verwichte, E., Nakariakov, V.M. and Fletcher, L. (2005) X-ray quasi-periodic pulsations in solar flares as magnetohydrodynamic oscillations. Astronomy and Astrophysics, 440(2), L59-L62. (doi:10.1051/0004-6361:200500169)



Publisher's URL: http://dx.doi.org/10.1051/0004-6361:200500169


We report the first observation at high spatial resolution of long-period quasi-periodic pulsations (QPP) of X-ray radiation during solar flares, made possible with the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI), supported by complementary data at other wavelengths from space-based and ground-based telescopes. Evidence for the presence of a transequatorial loop possibly responsible for the detected periodicity connected with its kink mode is found. Our findings suggest that QPP can be interpreted as a periodic pumping of electrons in a compact flaring loop, modulated by oscillations in a magnetically linked and larger loop acting as a long-period magnetohydrodynamic resonator.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Fletcher, Professor Lyndsay
Authors: Foullon, C., Verwichte, E., Nakariakov, V.M., and Fletcher, L.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Astronomy and Astrophysics
Publisher:EDP Sciences
ISSN (Online):1432-0746
Copyright Holders:Copyright © 2005 EDP Sciences
First Published:First published in Astronomy and Astrophysics 440(2):L59-L62
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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