Tsiklauri, D and Nakariakov, VM 2001, 'Wide-spectrum slow magnetoacoustic waves in coronal loops' , Astronomy and Astrophysics, 379 (3) , pp. 1106-1112.
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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: | Article |
|---|---|
| Uncontrolled Keywords: | Magnetohydrodynamics MHD waves, sun: activity, sun: corona, sun: oscillations, sun: UV radiation |
| Themes: | Subjects / Themes > Q Science > QB Astronomy Subjects outside of the University Themes |
| Schools: | Schools > School of Computing, Science and Engineering |
| Journal or Publication Title: | Astronomy and Astrophysics |
| Publisher: | EDP Sciences |
| Refereed: | Yes |
| ISSN: | 00046361 |
| Depositing User: | H Kenna |
| Date Deposited: | 03 Sep 2007 14:48 |
| Last Modified: | 09 Aug 2017 14:24 |
| URI: | http://usir.salford.ac.uk/id/eprint/385 |
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