Mass motions in impulsive flarelike brightenings as observed by OSO 8

Journal Article · Thu Feb 15 04:00:00 EST 1979 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/156849· OSTI ID:6052560

Bruner, Jr, E C; Lites, B W

CIV lambda1548 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 s. These events indicate that the emitting material is moving downward at velocities of up to 30 km s/sup -1/. 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.

• Research Organization: Lockheed Palo Alto Research Laboratory, Palo Alto, California
• OSTI ID: 6052560
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 228:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
BOUNDARY LAYERS
CHROMOSPHERE
FLUID MECHANICS
HYDRODYNAMICS
LAYERS
MAGNETOHYDRODYNAMICS
MASS TRANSFER
MECHANICS
SHOCK WAVES
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR CORONA
SOLAR FLARES
SPECTRA
SPECTRAL SHIFT
SUNSPOTS
ULTRAVIOLET SPECTRA
WAVE PROPAGATION