Physics
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...69..373l&link_type=abstract
Solar Physics, vol. 69, Feb. 1981, p. 373-389. Research supported by the Lockheed Independent Research Program;
Physics
6
Chromosphere, Emission Spectra, Solar Atmosphere, Solar Corona, Solar Flares, Solar Spectra, Calcium, H Alpha Line, Line Spectra, Mass Flow, Microwaves, Oso-8, Red Shift, Solar Radiation, Time Series Analysis, X Ray Irradiation
Scientific paper
Several solar flares were observed from their onset in C IV 1548.2 A and 1-8 A X-rays using instruments on OSO-8. It is found that impulsive brightening in C IV is often accompanied by redshifts, interpreted as downflows, of the order of 80 km/s. The maximum soft X-ray intensity usually arrives several minutes after the maximum C IV intensity. The most energetic C IV event observed shows a small blueshift just before reaching maximum intensity; estimates of the mass flux associated with this upflow through the transition zone are consistent with the increase of mass in the coronal loops as observed in soft X-rays. Finally, it is suggested that the frequent occurrence of violent dynamical processes at the onset of the flare is associated with the initial energy release mechanism.
Bruner Elmo C. Jr.
Lites Bruce W.
Wolfson Jacob C.
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