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Interpretation of Hα contrast profiles of chromospheric fine structures

✍ Scribed by L. E. Cram

Publisher
Springer
Year
1975
Tongue
English
Weight
783 KB
Volume
42
Category
Article
ISSN
0038-0938

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✦ Synopsis

Recent observations of the Ha contrast profiles of identifiable chromospheric fine structures are interpreted in terms of an empirical model. It is shown that the parameters inferred from an application of Beckers' 'cloud' model are unreliable, and the problem of line asymmetries is re-examined.

Quantitative models for the Ha chromosphere near the limb suggest that the 'dark band' phenomenon is due to low opacity in the neighbourhood of the temperature minimum, while the peculiar appearance of mottle contrast profiles near the limb is explained in terms of foreground absorption.

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