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Observation of a Prominence Heating and the Heating Mechanism

Published online by Cambridge University Press:  12 April 2016

L. Ofman ,
Z. Mouradian ,
T.A. Kucera  and
A.I. Poland
L. Ofman
Affiliation:
Hughes STX/NASA Goddard Space Flight Center, Code 682, Greenbelt, MD 20771, USA
Z. Mouradian
Affiliation:
Observatoire de Paris-Meudon, DASOP-CNRS URA 326, F–92195 Meudon Cedex, France
T.A. Kucera
Affiliation:
SAC/NASA Goddard Space Flight Center, Code 682, Greenbelt, MD 20771, USA
A.I. Poland
Affiliation:
NASA Goddard Space Flight Center, 682, Greenbelt, MD 20771, USA

Abstract

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An arch-shaped prominence was observed with SUMERSOHO spectrometer on March 31–April 1, 1996. The observations were performed at three wavelengths in the Lyman continuum. Ten successive images were obtained at 41 minute time intervals. Based on the computed models of Gouttebroze-Heinzel-Vial we have determined the temperature distribution of the prominence using the intensity ratio of 876 Å and 907 Å. The observed time sequence shows that the prominence disappears by heating, i.e., ionization of hydrogen: a thermal DB. We model the heat input with the linearized MHD equations using a prescribed initial density and a broad-band spectrum of Alfvén waves and find a good qualitative agreement with observations. In the model the prominence is heated by the resonant absorption of Alfvén waves with frequencies that match the resonant condition for a particular flux tube structure that is determined by the magnetic field topology and density.

Type
Filaments and Their Environment
Information
International Astronomical Union Colloquium , Volume 167: New Perspectives on Solar Prominences , 1998 , pp. 159 - 162
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

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