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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, 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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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 |
|---|---|
| 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 |
| 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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