Mass motions in impulsive flarelike brightenings as observed by OSO 8

Details Mass motions in impulsive flarelike brightenings as observed by OSO 8 Mass motions in impulsive flarelike brightenings as observed by OSO 8

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..322b&link_type=abstract

Astrophysical Journal, Part 1, vol. 228, Feb. 15, 1979, p. 322-329.

Astronomy and Astrophysics

Astrophysics

18

Chromosphere, Line Shape, Magnetohydrodynamic Flow, Satellite Observation, Solar Flares, Solar Spectra, Oso-8, Solar Activity Effects, Solar Corona, Spectroheliographs, Sunspots, Ultraviolet Spectra

Scientific paper

C IV 1548-A line profiles obtained with the University of Colorado spectrometer aboard OSO 8 reveal transient, redshifted brightenings in the chromosphere-corona transition region above active regions and sunspots. In these events the intensity rises by factors of up to 5 in less than the profile sampling interval of 27 sec. These events indicate that the emitting material is moving downward at velocities of up to 30 km/sec. The increase in line intensity and the amount of motion are consistent with the interpretation of these events as pressure waves propagating down magnetic flux loops.

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