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An empirical interpretation for the time evolution of the CaiiK line

✍ Scribed by Sou-Yang Liu; Andrew Skumanich

Publisher
Springer
Year
1974
Tongue
English
Weight
280 KB
Volume
38
Category
Article
ISSN
0038-0938

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✦ Synopsis

An empirical approach to interpret the time evolution of the high spatial resolution Ca Ii K line is presented. We specify the physical parameters, such as electron temperature, hydrogen density, and velocity (microturbulent and systematic) as functions of height. The electron density is obtained from scaled non-LTE solutions for hydrogen ionization. The population indices, and thus the Ca n source functions, for a 5-level Ca II atom are computed by using the generalized Newton-Raphson method. K line profiles are then synthesized for different evolutionary stages and are compared with the observed ones. The explanation of the 'peculiar' type profile is also attempted.

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