Dynamics of solar coronal eruptions (CROSBI ID 97065)
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Podaci o odgovornosti
Vršnak, Bojan
engleski
Dynamics of solar coronal eruptions
The kinematics of 87 solar eruptive events (flare sprays, eruptive prominences, and coronal transients) observed above the solar limb are studied. The data reveal a clear statistical trend for the highest measured value of the acceleration to be lower in the events taking place at a larger radial distance. The majority of events (84\%) show a phase of exponential-like growth of the velocity. The growth rate decreases with the height at which this regime sets in. A phase of constant acceleration was found only in 11\% of cases. In the postacceleration phase a constant velocity regime was found in 57\% of events. A considerable number of eruptions (32\%) exposed a deceleration, most often showing an exponential-like decay of the velocity. The related theoretical models are confronted with the observations, and the implications are discussed.
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