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Refined magneto-seismological technique for the solar corona

Verth, G., Erdelyi, R. and Jess, D.B. (2008) Refined magneto-seismological technique for the solar corona. Astrophysics Journal , 687 (1). pp. 45-48. ISSN 1538-4357

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Abstract

We present a step-by-step guide of a refined magnetoseismological technique for plasma diagnostics in the Sun's corona. Recently developed MHD wave theory which models a coronal loop as an expanding magnetic flux tube with an arbitrary longitudinal plasma density profile is applied to TRACE observations of fast kink oscillations. The theory predicts that using the observed ratio of the first overtone and fundamental mode to predict the plasma density scale height and not taking account of loop expansion will lead to an overestimation of scale height. For the first time, the size of this correction is quantified directly from observation and for the particular case study presented here, it is found that the overestimation is approximately by a factor of 2.

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: 17 Mar 2010 16:41
Last Modified: 07 Jun 2010 11:10
Published Version: http://dx.doi.org/10.1086/593184
Status: Published
Publisher: Institute of Physics Publishing
Identification Number: 10.1086/593184
URI: http://eprints.whiterose.ac.uk/id/eprint/10535

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