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Self-organization of magnetoacoustic waves in a thermally unstable environment
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Chin, Robert, Verwichte, E. (Erwin), Rowlands, G. (George) and Nakariakov, V. M. (Valery M.). (2010) Self-organization of magnetoacoustic waves in a thermally unstable environment. Physics of Plasmas, Vol.17 (No.3). article no. 032107 . ISSN 1070-664X
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Official URL: http://dx.doi.org/10.1063/1.3314721
Abstract
The nonlinear evolution of magnetoacoustic waves in a nonadiabatic plasma is investigated analytically. The effect of plasma activity due to linear and quadratic heating and radiative cooling on propagating magnetoacoustic waves in a uniform plasma is considered. A nonlinear evolution equation is derived and stationary solutions are looked for the various combination of signs of the linear and quadratic heating-cooling terms, which determine the thermal activity of the plasma. It is shown that self-organizing magnetoacoustic waves (autowaves) exist in an active plasma. These wave have amplitudes that are independent from the initial conditions and function of plasma properties only. Their potential diagnostic purposes are discussed. Furthermore, magnetoacoustic autosolitary waves are shown to exist. They have been modeled using a novel perturbative technique, which allows to determine their propagation speed and shape. (C) 2010 American Institute of Physics. [doi:10.1063/1.3314721]
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Library of Congress Subject Headings (LCSH): | Magnetohydrodynamics, Solar oscillations, Plasma (Ionized gases), Plasma waves |
| Journal or Publication Title: | Physics of Plasmas |
| Publisher: | American Institute of Physics |
| ISSN: | 1070-664X |
| Date: | March 2010 |
| Volume: | Vol.17 |
| Number: | No.3 |
| Number of Pages: | 12 |
| Page Range: | article no. 032107 |
| Identification Number: | 10.1063/1.3314721 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) |
| Grant number: | CEP/D062837/1 (EPSRC) |
| URI: | http://wrap.warwick.ac.uk/id/eprint/6137 |
Data sourced from Thomson Reuters' Web of Knowledge
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