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Prominence Seismology: wavelet analysis of filament oscillations

Pinter, B., Jain, R., Tripathi, D. and Hiraoki, I. (2008) Prominence Seismology: wavelet analysis of filament oscillations. The Astrophysical Journal, 680 (2). pp. 1560-1568. ISSN 0004-637X

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The temporal and spatial behavior of a large-amplitude filament oscillation is investigated using wavelet analysis. The extreme-ultraviolet (EUV) images of the phenomenon, which occurred on 2002 October 15, were taken from the EUV Imaging Telescope on board the Solar and Heliospheric Observatory (SOHO). The wavelet spectra, extracted from the intensity data, show that the filament oscillates as a rigid body, with a period of about 2.5-2.6 hr which is almost constant along the filament. The period slowly decreases with time until the filament erupts. No clear sign of the eruption is found in the wavelet spectrum prior to the eruption, that followed the filament oscillation. The axial component of the magnetic field is estimated between 1 and 5 G, which is believed to be reasonable for a polar crown filament of this kind.

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 15:57
Last Modified: 16 Nov 2015 11:48
Published Version: http://dx.doi.org/10.1086/588273
Status: Published
Publisher: Institute of Physics Publishing
Identification Number: 10.1086/588273
URI: http://eprints.whiterose.ac.uk/id/eprint/10493

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