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

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Foullon, C. (Claire), Verwichte, E. (Erwin), Nakariakov, V. M. (Valery M.) and Fletcher, L. (Lyndsay). (2005) X-ray quasi-periodic pulsations in solar flares as magnetohydrodynamic oscillations. Astronomy & Astrophysics, Vol.440 (No.2). L59-L62. ISSN 0004-6361

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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: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Magnetohydrodynamics, Sun -- Corona, Solar flares, Solar oscillations
Journal or Publication Title: Astronomy & Astrophysics
Publisher: EDP Sciences
ISSN: 0004-6361
Official Date: September 2005
Volume: Vol.440
Number: No.2
Page Range: L59-L62
Identification Number: 10.1051/0004-6361:200500169
Status: Peer Reviewed
Access rights to Published version: Open Access
Funder: European Space Agency (ESA), United States. National Aeronautics and Space Administration (NASA)
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URI: http://wrap.warwick.ac.uk/id/eprint/3585

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