Physics
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...89...89m&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 89, Nov. 1983, p. 89-102.
Physics
156
Coronal Loops, Plasma Acceleration, Solar Flares, Dimensions, K Lines, Kinematics, Radial Velocity, Solar Wind Velocity
Scientific paper
The kinematic properties of a dozen 'loop-like' coronal transients have been examined over the range 1.2 - 2.4 R_sun; from Sun center. Values and trends of transient geometry, including radial height, lateral width at maximum extent, distance from loop top to height of maximum width, and lateral width at a fixed height above the instrument occulting disk at 1.2 R_sun;, are given. Radial and lateral speeds of expansion are tabulated. Flare-associated events are found to exhibit the highest speeds, and show little acceleration with height; eruptive-associated events exhibit large accelerations. It is suggested that flare-associated events result from an impulsive, localized input to the corona; eruptive-associated events are subjected to appreciable net forces over radial heights of one solar radius (or more) above the solar limb. It is conjectured that the pressure gradient forces responsible for the generation of the solar wind may play an important role in accelerating these latter events.
Fisher Richard Royal
MacQueen Robert M.
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