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Damping of vertical coronal loop kink oscillations through wave tunneling
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Brady, Christopher S. and Arber, T. D. (2005) Damping of vertical coronal loop kink oscillations through wave tunneling. Astronomy & Astrophysics, Vol.438 (No.2). pp. 733-740. doi:10.1051/0004-6361:20042527 ISSN 0004-6361.
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Official URL: http://dx.doi.org/10.1051/0004-6361:20042527
Abstract
The decay rate of vertical kink waves in a curved flux tube is modeled numerically. The full MHD equations are solved for a curved equilibrium flux tube in an arcade geometry and the decay of ψ, the integral over the flux tube of the modulus of the velocity perpendicular to the local magnetic field, is measured. These simulations are 2D and are thus restricted to kink oscillations in the loop plane. The decay rate is found to increase with increasing wavelength, increasing β and decreasing density contrast ratio. The wave tunneling effect is shown to be a possible mechanism for the high decay rate of the recent observed kink oscillation reported by Wang & Solanki (2004).
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Sun -- Corona, Solar magnetic fields, Solar oscillations, Sun -- Loop prominences | ||||
Journal or Publication Title: | Astronomy & Astrophysics | ||||
Publisher: | EDP Sciences | ||||
ISSN: | 0004-6361 | ||||
Official Date: | August 2005 | ||||
Dates: |
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Volume: | Vol.438 | ||||
Number: | No.2 | ||||
Page Range: | pp. 733-740 | ||||
DOI: | 10.1051/0004-6361:20042527 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) |
Data sourced from Thomson Reuters' Web of Knowledge
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