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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. doi:10.1051/0004-6361:200500169 ISSN 0004-6361.
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Official URL: http://dx.doi.org/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: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > 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 | ||||
Dates: |
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Volume: | Vol.440 | ||||
Number: | No.2 | ||||
Page Range: | L59-L62 | ||||
DOI: | 10.1051/0004-6361:200500169 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Funder: | European Space Agency (ESA), United States. National Aeronautics and Space Administration (NASA) |
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