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Sausage oscillations in multishell coronal structures
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Pascoe, D. J., Nakariakov, Valery M. and Arber, T. D. (2007) Sausage oscillations in multishell coronal structures. In: Topical Conference on Solar MHD Wave Studies held in Honor of Bernard Robets, Palma de Mallorca, Spain, 29 May - 01 Jun 2006. Published in: Solar Physics, Vol.246 (No.1). pp. 165-175.
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Official URL: http://dx.doi.org/10.1007/s11207-007-9055-x
Abstract
The effect of fine multilayered structuring on the resonant periods of global sausage (m=0), fast magnetoacoustic oscillations of coronal loops is studied for the straight magnetic slab model filled with a zero-beta plasma. The slab is considered to have a one-dimensional inhomogeneity of the Alfven speed in the direction perpendicular to the axis of the slab, which coincides with the equilibrium, straight, magnetic field. This magnetic configuration models an oscillating coronal loop that is formed by a bundle of field-aligned, smooth, concentric, circular shells of variable density and width. The number of the layers (or shells), along with their density, width, and radial steepness, are randomly distributed. It is shown that the resonant properties of long-wavelength sausage standing modes of the slab are not sensitive to the details of fine structuring. It is concluded that the coronal seismological technique for the determination of the magnetic field strength by the period of global sausage oscillations is not sensitive to the fine multilayered or multishell structuring.
| Item Type: | Conference Item (Paper) |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Solar Physics |
| Publisher: | Springer Netherlands |
| ISSN: | 0038-0938 |
| Date: | November 2007 |
| Volume: | Vol.246 |
| Number: | No.1 |
| Number of Pages: | 11 |
| Page Range: | pp. 165-175 |
| Identification Number: | 10.1007/s11207-007-9055-x |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Conference Paper Type: | Paper |
| Title of Event: | Topical Conference on Solar MHD Wave Studies held in Honor of Bernard Robets |
| Type of Event: | Conference |
| Location of Event: | Palma de Mallorca, Spain |
| Date(s) of Event: | 29 May - 01 Jun 2006 |
| URI: | http://wrap.warwick.ac.uk/id/eprint/30869 |
Data sourced from Thomson Reuters' Web of Knowledge
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