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Determination of Temperature in Solar Prominences/Filaments Using FISS Observations

Published online by Cambridge University Press:  06 January 2014

Jongchul Chae ,
Hyungmin Park  and
Donguk Song
Jongchul Chae
Affiliation:
Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea email: [email protected]
Hyungmin Park
Affiliation:
Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea email: [email protected]
Donguk Song
Affiliation:
Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea email: [email protected]
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Abstract

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Using the Fast Imaging Solar Spectrograph of the 1.6 meter New Solar Telescope at Big Bear, we simultaneously took the spectral profiles of the Hα line and the Ca ii line at 854.2 nm from prominences beyond the solar limb and filaments on the disk. The spectral data were fitted by the slab model of radiative transfer with constant source function, either with zero background intensity profile (in prominences) or with carefully constructed background intensity profile (in filaments). These observations with different perspectives and different analyses produced consistent results: temperature inside prominences/filaments ranges from 4000 to 20000 K with a mean of about 9500 K. We expect that this kind of observation and analysis with higher spatial resolution and higher temporal resolution will allow us to study in detail the thermal structure and evolution of plasma in prominences.

Keywords

line: profilesplasmasinstrumentation: spectrographstechniques: spectroscopicSun: prominences
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S300: Nature of Prominences and their role in Space Weather , June 2013 , pp. 85 - 89
Copyright
Copyright © International Astronomical Union 2013 

References

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