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Wide-spectrum slow magnetoacoustic waves in coronal loops
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Tsiklauri, D. and Nakariakov, Valery M.. (2001) Wide-spectrum slow magnetoacoustic waves in coronal loops. Astronomy & Astrophysics, Vol.379 (No.3). pp. 1106-1112. ISSN 0004-6361
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Official URL: http://dx.doi.org/10.1051/0004-6361:20011378
Abstract
A model interpreting variations of EUV brightness upward propagating in solar coronal loops as slow magnetoacoustic waves is developed. A loop is considered to have a non-zero plane inclination angle and offset of the circular loop centre from the baseline. The model also incorporates effects of dissipation and gravitational stratification. A linear evolutionary equation is derived and applied to investigations of slow wave dynamics. Both the non-zero plane inclination and the offset decrease the growth of the wave amplitude due to stratification. It is shown that wide-spectrum slow magnetoacoustic waves, consistent with currently available observations in the low frequency part of the spectrum, can provide a rate of heat deposition sufficient to heat the loop. In this scenario, the heat would be deposited near the loop footpoints, which agrees with the current observational data.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Divisions: | Faculty of Science > Physics |
| Library of Congress Subject Headings (LCSH): | Magnetohydrodynamic waves, Sun -- Corona, Sun -- Loop prominences, Solar oscillations |
| Journal or Publication Title: | Astronomy & Astrophysics |
| Publisher: | EDP Sciences |
| ISSN: | 0004-6361 |
| Date: | December 2001 |
| Volume: | Vol.379 |
| Number: | No.3 |
| Page Range: | pp. 1106-1112 |
| Identification Number: | 10.1051/0004-6361:20011378 |
| Status: | Peer Reviewed |
| Access rights to Published version: | Open Access |
| Funder: | Particle Physics and Astronomy Research Council (Great Britain) (PPARC) |
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| URI: | http://wrap.warwick.ac.uk/id/eprint/3817 |
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