Nonthermal velocities in the chromosphere-corona transition zone of active solar regions

Details Nonthermal velocities in the chromosphere-corona transition zone of active solar regions Nonthermal velocities in the chromosphere-corona transition zone of active solar regions

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980crasb.290..317d&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie B - Sciences Physiques, vol. 290, no. 13, Mar. 31, 1980, p. 317-320. In Fr

Physics

2

Chromosphere, Solar Activity, Solar Atmosphere, Solar Corona, Solar Spectra, Oso-8, Satellite Observation, Ultraviolet Spectra

Scientific paper

OSO 8 satellite observations of lines of the Si II, Si IV, C IV and O VI ions in the ultraviolet spectrum of active solar regions are considered. It is noted that for the case of pronounced physical dispersion of the data, there is no marked systematic variation from the center to the edge of the solar disk. The nonthermal velocities in the transition zone are, for a given temperature, the same as for quiet regions. In addition, the velocities tend to reach a constant value at temperatures above 100,000 deg K, and the observed physical dispersion is much higher than the inaccuracy of the data.

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