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Theoretical Line Profiles for Hydrogen and Calcium under Chromospheric Conditions
Black, R. B. T.
Proceedings of the Astronomical Society of Australia, Volume 1, Issue 2, pp. 52-53
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Recent high resolution Ha photographs by Bray and Loughhead (unpublished) have confirmed that much of the chromosphere is quite non-uniform. Rather, it appears to consist of many distinct structures, which have a typical transverse section of several seconds of arc, i.e. about 2000 km. The aim of the research reported in this contribution is to attempt to analyse the non-uniform chromosphere by first investigating a single structure. A simple model of a structure was chosen. From the model, line profiles of Halpha and the H and K lines of Can were computed assuming a variety of physical conditions to exist in the feature.

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