Physics
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...96...35e&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 96, March 1985, p. 35-51. Research supported by the Norges Almenvitenskapelige Forskningsra
Physics
19
Coronal Loops, Doppler Effect, Polarimetry, Solar Maximum Mission, Solar Physics, Solar Prominences, Chromosphere, H Alpha Line, Line Spectra, Photosphere, Solar Atmosphere, Solar Magnetic Field, Sunspots
Scientific paper
The solar transition region in the neighborhood of prominences has been studied from observations with the Ultraviolet Spectrometer and Polarimeter of NASA's Solar Maximum Mission satellite. Dopplergrams from observations of the transition-region lines C IV 1548 A and Si IV 1393 A, which are formed at about 100,000 K, give velocity amplitudes typically in the range + or - 15 km/s. Prominences are found to be located very close to dividing lines between areas of up- and down-drafts in the transition-region. The observed pattern suggests that the 100,000 K gas flows take place within arcades of magnetic loops, which most likely are part of the supporting magnetic structure for the prominence matter. An additional band of blue-ward Doppler shifts is frequently seen close to quiescent prominences. This may be the source of outward flowing matter along the helmet streamers above filament channels.
Engvold Odbjørn
Reichmann Edwin
Tandberg-Hanssen Einar
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