✦ LIBER ✦

Oscillations of visible chromosphere boundary and regularity in position of spicule groups along the limb

✍ Scribed by July V. Platov; Nataly S. Shilova

Publisher: Springer
Year: 1971
Tongue: English
Weight: 395 KB
Volume: 19
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00148823

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✦ Synopsis

A series of Ha-filtergrams, covering about 42 min, was studied in order to obtain quantitative data on the oscillations of the visible chromosphere boundary and on the regularity in position of spicule groups along the limb. The results obtained reveal the existence of relatively slow vertical oscillations (a background) superimposed with those of ~ 5 rain period. A horizontal dimension of a spicule group ~ 4000 km; a change of the chromosphere height within the latter occurs practically synchronously. A good correlation of height changes for groups of ~ 25000 km apart is observed.