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HD 129274


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Calcium in the atmospheres of peculiar stars
Data on the calcium content in the atmospheres of peculiar stars,obtained with model atmospheres and from literature sources, areanalyzed. The Ca I and Ca II spectra in Ap stars are studied. It isshown that the equivalent widths of Ca II K lines in the spectra of Apstars correspond on the average to their color indices B - V, although alarger scatter is observed than for normal stars. The conclusion thatthe calcium content in the atmospheres of Ap stars is normal on theaverage is drawn on the basis of an analysis of the effectivetemperatures used to find the calcium content, the methods ofdetermining the content, and the accuracy in measuring the equivalentwidths of Ca I and Ca II lines. The strengthening and weakening of theintensity of the Ca II K line in the spectra of peculiar stars are mostlikely explained by the difference in the structures of the atmospheresof Ap stars from normal.

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Observation and Astrometry data

Constellation:Hydre
Right ascension:14h42m25.24s
Declination:-26°34'50.9"
Apparent magnitude:9.584
Proper motion RA:-31.1
Proper motion Dec:-5
B-T magnitude:10.268
V-T magnitude:9.641

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 129274
TYCHO-2 2000TYC 6754-1965-1
USNO-A2.0USNO-A2 0600-17074896
HIPHIP 71902

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