Impulsive EUV bursts observed in C IV with OSO-8

Details Impulsive EUV bursts observed in C IV with OSO-8 Impulsive EUV bursts observed in C IV with OSO-8

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...66..357a&link_type=abstract

Solar Physics, vol. 66, June 1980, p. 357-370.

Astronomy and Astrophysics

Astronomy

22

Bursts, Carbon, Far Ultraviolet Radiation, Line Spectra, Solar Radiation, Solar Spectra, Spaceborne Astronomy, Brightness Temperature, Doppler Effect, Life (Durability), Oso-8, Red Shift, Solar Corona, Spectral Energy Distribution, Spectral Line Width, Time Series Analysis

Scientific paper

Time sequences of profiles of the 1548 A line of C IV containing 51 EUV bursts observed in or near active regions are analyzed to determine the brightness, Doppler shift and line broadening characteristics of the bursts. The bursts have mean lifetimes of approximately 150 s, and mean increases in brightness at burst maximum of four-fold as observed with a field of view of 2 x 20 arc sec. Mean burst diameters are estimated to be 3 arc sec, or smaller. All but three of the bursts show Doppler shifts with velocities sometimes exceeding 75 km/s; 31 are dominated by red shifts and 17 are dominated by blue shifts. Approximately half of the latter group have red-shifted precursors. The bursts are interpreted as prominence material, such as surges and coronal rain, moving through the field of view of the spectrometer.

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