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)

Abstract

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
• Status: Published
• Refereed: Yes
• 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: 0004-6361
• 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