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EUV observations of quiescent prominences from SkylabMeasurements of line intensities and line widths for three quiescent prominences observed with Naval Research Laboratory slit spectrograph on ATM/Skylab are reported. The wavelengths of the observed lines cover the range 1175 A to 1960 A. The measured intensities have been calibrated to within approximately a factor 2 and are average intensities over a 2 arcsec by 60 arcsec slit. Nonthermal velocities from the measured line widths are derived. The nonthermal velocity is found to increase with temperature in the prominence transition zone. Electron densities and pressures are derived from density sensitive line ratios. Electron pressures for two of the prominences are found to lie in the range 0.04-0.08 dyn/sq cm, while values for the third and most intense and active of the three prominences are in the range 0.07-0.22 dyn/sq cm.
Document ID
19790055698
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Moe, O. K.
(Oslo, Universitetet Oslo, Norway)
Cook, J. W.
(Oslo Univ. Norway)
Mango, S. A.
(U.S. Navy, Naval Research Laboratory, Washington D.C., United States)
Date Acquired
August 9, 2013
Publication Date
March 1, 1979
Publication Information
Publication: Solar Physics
Volume: 61
Subject Category
Solar Physics
Accession Number
79A39711
Funding Number(s)
CONTRACT_GRANT: DPR-S60404G
Distribution Limits
Public
Copyright
Other

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