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Influence of longitudinal structure in the fast modes of prominence threads

Published online by Cambridge University Press:  01 September 2007

A. J. Díaz ,
R. Oliver  and
J. L. Ballester
A. J. Díaz
Affiliation:
Universitat de les Illes Balears, Palma de Mallorca, Spain email: toni.diaz@uib.es
R. Oliver
Affiliation:
Universitat de les Illes Balears, Palma de Mallorca, Spain email: toni.diaz@uib.es
J. L. Ballester
Affiliation:
Universitat de les Illes Balears, Palma de Mallorca, Spain email: toni.diaz@uib.es
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Abstract

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Recent high-resolution observations have pointed out that prominences are made of small threads (also named fibrils) piled up to form the body of the prominence. These fine structures also seem to support their own oscillatory modes, while their effect on the global modes of the prominences are less certain. We study the effect of adding a smooth transition layer between the prominence material and the corona along the magnetic field line, since previous studies have considered a jump in density in this interface. Then we compare the results with previous models and check that these transition layers do not affect significantly the periods of the modes.

Keywords

wavesSun: atmosphereSun: CoronaSun: oscillations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S247: Waves & Oscillations in the Solar Atmosphere: Heating and Magneto-Seismology , September 2007 , pp. 167 - 172
Copyright
Copyright © International Astronomical Union 2008

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