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Thermally damped linear compressional waves in a 2D solar coronal model

Marcu, A., Ballai, I. and Orza, B. (2007) Thermally damped linear compressional waves in a 2D solar coronal model. In: Erdelyi, R. and Mendoza-Briceno, C.A., (eds.) Waves & Oscillations in the Solar Atmosphere: Heating and Magneto-Seismology. IAU Symposium 247, September 17-22, 2007, Porlamar, Isla de Margarita, Venezuela. Proceedings of the International Astronomical Union, 3 (s247). Cambridge University Press , Cambridge , pp. 320-323. ISBN 978-0-52187-4694

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The high resolution observations (TRACE and SOHO) of waves in coronal structures have revealed a rapid damping of modes, sometimes their damping length being of the same order as their wavelength. The rapid damping of modes in coronal loops permits us to derive values for magnetic field and transport coefficients. In this contribution we study the damping of linear compressional waves considering a two-dimensional propagation in gravitationally stratified plasma in the presence of thermal conduction. By considering this 2D model, we show that the presence of an additional transversal motion has an important effect on the damping of the waves. This theoretical model allows as to conclude that the main effects influencing the damping of the waves are the degree of the transversal structuring and temperature.

Item Type: Proceedings Paper
Copyright, Publisher and Additional Information: © 2008 International Astronomical Union. Reproduced with the permission of the copyright holder.
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: 29 Mar 2010 09:50
Last Modified: 19 Nov 2015 06:57
Published Version: http://dx.doi.org/10.1017/S1743921308015032
Status: Published
Publisher: Cambridge University Press
Identification Number: 10.1017/S1743921308015032
URI: http://eprints.whiterose.ac.uk/id/eprint/10580

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