✦ LIBER ✦

Multi-component models for the formation of the chromospheric CaiiK line

✍ Scribed by L. E. Cram

Publisher: Springer
Year: 1972
Tongue: English
Weight: 602 KB
Volume: 22
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00148703

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✦ Synopsis

Recent high resolution observations of the Call fine structure are discussed, An analytic method is applied to examine the effects of velocity fields on multi-component model atmospheres in which the central reversal in the bright components is due to self-absorption. It is shown that the inclusion of quite reasonable velocity fields permits the reproduction of not only the high resolution profiles of the small scale emission features but also the qualitative centre-limb behaviour of the spatially averaged profiles. The method is also used to examine models suggested by Pasachoff and others in which the double reversal is a statistical effect of singly peaked velocity shifted profiles. These models are shown to encounter severe difficulties near the limb.

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