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SUMER/SOHO Filament Observations in Selected Lyman Lines

Published online by Cambridge University Press:  12 April 2016

B. Schmieder ,
T. Kucera ,
P. Heinzel  and
J.-C. Vial
B. Schmieder
Affiliation:
Observatoire de Paris, Section Meudon, F 92195 Meudon, France
T. Kucera
Affiliation:
NASA, GSFC, MD 20771, USA
P. Heinzel
Affiliation:
Astronomical Institute, CZ 25165, Ondřejov, Czech Republik
J.-C. Vial
Affiliation:
Institut d’Astrophysique Spatiale, CNRS/Université Paris XI, Bât. 121, 91405 Orsay Cedex, France

Abstract

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On September 21, 1996 a filament located in a region close to an enhanced network was observed with the SOHO SUMER and CDS instruments. Four Lyman lines have been detected (Lδ, Lϵ, L-6, L-7) by SUMER in the raster mode. We have corrected the spectral data for flatfield and destreching and made wavelength and absolute intensity calibrations. In all these lines we detect a central absorption and an asymmetry in the intensity of the two peaks. Preliminary NLTE computations indicate that these Lyman profiles and their absolute intensities can be reproduced with the existing models provided that we take into account a prominence-corona transition region (PCTR).

Type
Filaments and Their Environment
Information
International Astronomical Union Colloquium , Volume 167: New Perspectives on Solar Prominences , 1998 , pp. 205 - 208
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

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