NASA NTRS · 19990070955
The Prolate Solar Chromosphere
Abstract
We present a comparative analysis of the chromospheric solar limb prolateness, using strictly simultaneous H-alpha, ground-based observations and HeII space-based observations. The typical prolateness is found to be DeltaD/D = 5.5 x 10(exp -3) in HeII and 1.2 x 10(exp -3) in H-alpha. The first measurements in the 30.4 nm HeII line over a period of two years. as well as coronal data, are discussed to explore further the origin of the prolateness and its possible consequences.
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Auchere, F., Boulade, S., Koutchmy, S., Smartt, R. N., Delaboudiniere, J. P., Georgakilas, A., Gurman, J. B., Artzner, G. E.. 1998-10-01. The Prolate Solar Chromosphere. https://ntrs.nasa.gov/citations/19990070955
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