CAOSP abstracts, Volume: 23, year: 1993
- Author(s): ZBORIL, M.; BUDAJ, J.; KLACKA, J.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 23, p. 45-49.
- Date: 07/1993
- Title: Si II autoionization and Fe II lines in the atmosphere of Bp star
- Keyword(s): STARS, ATMOSPHERES, CHEMICALLY PECULIAR
- Pages: 45 -- 49
The role of Si II autoionization lines around the lambda 520 nm depression
is investigated using the curve of growth approach. While absorption of the
Fe II ion decreases with increasing temperature, the absorption of the Si ion
increases. However, absorption of the singly ionized Fe is still dominant in
the depression. This is confirmed by consistent computations of synthetic
spectra. The effect of atmosphere stratification in optical depths of silicon
does not enhance the absorption in lambda 520 nm dominantly.
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