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Fast magnetoacoustic waves in a randomly structured solar corona
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Murawski, K., Nakariakov, V. M. (Valery M.) and Pelinovskiĭ, E. N. (2001) Fast magnetoacoustic waves in a randomly structured solar corona. Astronomy & Astrophysics, Vol.366 (No.1). pp. 306-310. doi:10.1051/0004-6361:20000027
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Official URL: http://dx.doi.org/10.1051/0004-6361:20000027
Abstract
The propagation of fast magnetoacoustic waves in a randomly structured solar corona is considered in the linear and cold plasma limits. The random field is assumed to be static and associated with plasma density inhomogeneities only. A transcendental dispersion relation for the fast magnetoacoustic waves which propagate perpendicularly to the magnetic field is derived in the weak random field approximation. It is shown analytically that the fast magnetosonic waves experience acceleration, attenuation, and dispersion in comparison to the homogeneous case. These analytical findings are essentially confirmed by numerical simulations for a wide-spectrum pulse, except that the waves were found decelerated. It is concluded that the coronal Moreton waves can be applied to MHD seismology of the solar corona.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Magnetohydrodynamic waves -- Mathematical models, Oscillations -- Mathematical models, Sun -- Corona -- Magnetic fields, Plasma astrophysics | ||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||
| Publisher: | EDP Sciences | ||||
| ISSN: | 0004-6361 | ||||
| Official Date: | January 2001 | ||||
| Dates: |
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| Volume: | Vol.366 | ||||
| Number: | No.1 | ||||
| Page Range: | pp. 306-310 | ||||
| DOI: | 10.1051/0004-6361:20000027 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access | ||||
| Funder: | Komitet Badań Naukowych (Poland) (KBN), North Atlantic Treaty Organization (NATO), International Association for the Promotion of Co-operation with Scientists from the Independent States of the Former Soviet Union (INTAS) | ||||
| Grant number: | 2 PO3D 017 17 (KBN), PST.CLG.976135 (NATO), 97 31931 (INTAS) |
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