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On absorption and scattering of P Modes by small-scale magnetic elements

Jain, R. and Gordovskyy, M. (2008) On absorption and scattering of P Modes by small-scale magnetic elements. Solar Physics, 251 (1-2). pp. 361-368. ISSN 1573-093X

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The solar surface is characterised everywhere by the presence of small-scale magnetic structures. Their collective behaviour in the form of active regions is known to have strong influence on p-mode power. For example, sunspots and plages are strong absorbers of acoustic waves. This paper studies the effects of individual small-scale magnetic elements to understand the details of absorption of p-mode power. For this, we consider a thin magnetic flux tube and calculate the phase shifts and the absorption coefficients by numerically solving the linearised MHD equations. The phase shifts calculated from the Born Approximation are then compared for the same range of degrees. The results are discussed with a view to understanding the physical mechanism.

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: 25 Mar 2010 12:48
Last Modified: 16 Nov 2015 11:48
Published Version: http://dx.doi.org/10.1007/s11207-007-9102-7
Status: Published
Publisher: Springer
Identification Number: 10.1007/s11207-007-9102-7
URI: http://eprints.whiterose.ac.uk/id/eprint/10494

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