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Spectroscopic Diagnostics of the UV Emitting Plasmas in Solar Flares Observed from SMM

Published online by Cambridge University Press:  12 April 2016

Chung-Chieh Cheng  and
E. Tandberg-Hanssen
Chung-Chieh Cheng
Affiliation:
E.O. Hulburt Center for Space Research Naval Research Laboratory Washington, DC
E. Tandberg-Hanssen
Affiliation:
NASA Marshall Space Flight Center Huntsville, AL

Extract

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The transition region exhibits dynamic changes during solar flares. To understand the energy release and transport processes in solar flares, it is important to determine observationally the physical conditions in the flare transition region plasmas, which emit in the UV wavelength ranges. During the Solar Maximum Mission (SMM) we observed many flares in the UV emission lines of Si IV (1402 Å) and 0 IV (1401 Å) using the Ultraviolet Spectrometer and Polarimeter (Woodgate et al. 1983). In this paper we present the Si IV/O IV flare observations, in particular the dynamic evolution of the transition zone plasmas (~ 105 K). We also studied the temporal and spatial correlations between the impulsive UV and hard X-ray bursts.

Type
Session 6. Poster Papers
Information
International Astronomical Union Colloquium , Volume 86: Eighth International Colloquium on Ultraviolet and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas , 1984 , pp. 147 - 150
Copyright
Copyright © Naval Research Laboratory 1984. Publication courtesy of the Naval Research Laboratory, Washington, DC.

References

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Cheng, C.-C., Tandberg-Hanssen, E., and Orwig, L.E. 1984, Ap. J., 278, 853.CrossRefGoogle Scholar
Woodgate, B.E. et al., 1980, Solar Phys., 65, 73.CrossRefGoogle Scholar