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Amplitude suppression and absorption of p-modes in magnetic flux tube

Gordovskyy, M. and Jain, R. (2008) Amplitude suppression and absorption of p-modes in magnetic flux tube. The Astrophysical Journal, 681 (1). pp. 664-671. ISSN 1538-4357

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The interaction of p-modes (acoustic waves) with a magnetic flux tube is investigated. A set of linearized MHD equations is solved numerically in a two-dimensional domainwith cylindrical geometry. Thewave functions for p-modes are calculated in and around magnetic flux tubes using eigenfunctions from the unperturbed solution as a boundary condition. The amplitudes of the oscillations are found to be suppressed in the magnetized region with the suppression decreasing with depth. It is also found that the absorption of p-modes strongly depends on the degree l as well as the flux tube radius and the magnetic field strength. Convergence of magnetic field may be necessary in order to fit simultaneously the observed phase shifts and absorption coefficients.

Item Type: Article
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield)
Depositing User: Mrs Megan Hobbs
Date Deposited: 12 Mar 2010 14:01
Last Modified: 16 Nov 2015 11:48
Published Version: http://dx.doi.org/10.1086/588208
Status: Published
Publisher: Institute of Physics Publishing
Identification Number: 10.1086/588208
URI: http://eprints.whiterose.ac.uk/id/eprint/10492

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