The Library
Fast magnetoacoustic waves in curved coronal loops. I, Trapped and leaky modes
Tools
Tools
Tools
Verwichte, E. (Erwin), Foullon, C. (Claire) and Nakariakov, V. M. (Valery M.) (2006) Fast magnetoacoustic waves in curved coronal loops. I, Trapped and leaky modes. Astronomy & Astrophysics, Vol.446 (No.3). pp. 1139-1149. doi:10.1051/0004-6361:20053955
![[img]](http://wrap.warwick.ac.uk/style/images/fileicons/application_pdf.png) |
PDF
WRAP_Verwichte_85_Fast_magnetoacoustic.pdf - Requires a PDF viewer. Download (1208Kb) |
Official URL: http://dx.doi.org/10.1051/0004-6361:20053955
Abstract
A study of vertically polarised fast magnetoacoustic waves in a curved coronal loop is presented. The loop is modeled as a semi-circular magnetic slab in the zero plasma-β limit. The governing equations for linear waves are derived. We show that the wave mode behaviour depends on the slope of the equilibrium density profile, which is modeled as a piece-wise continuous power law curve of index α. For all profiles, except for α = −4, wave modes are not trapped in the loop and leak out into the external medium through wave tunneling. The particular case of α = −4, which corresponds to a linearly increasing Alfvén speed profile, is examined in more detail as this is the only model that can support trapped wave modes. We compare the results with a straight slab model and find similar behaviour. Coupling between sausage and kink wave modes has not been found in the model.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Magnetohydrodynamics, Sun -- Loop prominences, Sun -- Corona, Solar oscillations | ||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||
| Publisher: | EDP Sciences | ||||
| ISSN: | 0004-6361 | ||||
| Official Date: | February 2006 | ||||
| Dates: |
|
||||
| Volume: | Vol.446 | ||||
| Number: | No.3 | ||||
| Page Range: | pp. 1139-1149 | ||||
| DOI: | 10.1051/0004-6361:20053955 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access | ||||
| Funder: | Royal Society (Great Britain), Leverhulme Trust (LT), Particle Physics and Astronomy Research Council (Great Britain) (PPARC) |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
Downloads
Downloads per month over past year
