Title: The effect of curvature on quasi-modes in coronal loops
Authors: Van Doorsselaere, Tom ×
Debosscher, Arnold
Andries, Jesse
Poedts, Stefaan #
Issue Date: 2004
Publisher: E d p sciences
Series Title: Astronomy & astrophysics vol:424 issue:3 pages:1065-1074
Article number: vandoorsselaere2004curvature
Abstract: This paper studies quasi-mode oscillations in models of coronal loops that include longitudinal curvature. Using a toroidal coordinate system to incorporate curvature in a basic coronal loop model, the linearized ideal MHD equations are solved for the plasma-beta = 0. As a result of the curvature, quasi-modes with different poloidal wave numbers are coupled resulting in modifications of the frequencies. However, for small curvature, only the coupling of quasi-modes with a neighbouring poloidal wave number remains in first order. In addition, the quasi-mode frequencies are unchanged up to first order in the curvature. The imaginary part of the frequency, however, does change in first order, and quasi-modes are slightly more damped in realistically curved coronal loop configurations.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
× corresponding author
# (joint) last author

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