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Chromospheric Fine Structures near the Solar Limb in Hα

Published online by Cambridge University Press:  14 August 2015

Rawi Bhavilai
Rawi Bhavilai*
Affiliation:
Dept. of Physics, Faculty of Science, Chulalongkorn University, Bangkok 5, Thailand

Abstract

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The solar limb has been studied visually and photographically in the light of Hα and the combined results are reported. The appearance of a spicule changes with wavelength settings. Effects due to changes of spicule velocities with height and opacity-wavelength relations are indicated. A number of bright spicules seen in the wings are identified with bright mottles seen in the line core. The dark band appears between Δλ=± 1.0 Å and Δλ= ±0.70 Å. Examination of a small mottle cluster in a series of photographs taken in steps from Hα+ 0.85 Å to Hα+ 0.10 Å leads to a three-dimensional model of a typical mottle cluster.

Type
Part I: The Quiet Chromosphere: Limb Phenomena
Information
Symposium - International Astronomical Union , Volume 56: Chromospheric Fine Structure , 1974 , pp. 25
Copyright
Copyright © Reidel 1974