Coronal transients near sunspot maximum

Physics

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Oso-7, Solar Corona, Stellar Mass Ejection, Sunspot Cycle, Coronagraphs, Mass Distribution, Maxima, Transient Response

Scientific paper

Solwind has been observing the sun's outer corona (2.6-10.0 solar radii) at 10-min intervals since March 28, 1979. These observations provide the first comprehensive view of coronal transients near the peak of a sunspot cycle. Six, well-defined transients in quick-look data have masses ranging from 7 x 10 to the 14th g to 2 x 10 to the 16th g and outward speeds ranging from 150 km/s to 900 km/s. The coronal transients near sunspot maximum seem to occur with a greater frequency and a wider latitude range than the transients during the declining phase of the cycle. In both eras, there is a good, but imperfect, association between the occurrence of coronal transients and surface phenomena such as eruptive prominences and flares.

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