VANADIUM ABUNDANCES IN EARLY A STARS

Vanadium-to-hydrogen ratios have been determined for o Peg, HR6127, HR465 (rare earth minimum), and HR8216. With respect to the solar system, vanadium is overabundant in the first two stars, possibly normal in the third, and underabundant in the fourth. The range in the V/H ratio in these four stars...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 1978-10, Vol.90 (537), p.536-542
Main Authors: COWLEY, CHARLES R., ELSTE, GUENTHER H., URBANSKI, JANET L.
Format: Article
Language:English
Subjects:
Ap stars
Astrophysics
Calcium
Chemically peculiar stars
Line spectra
Stars
Stellar spectra
Stellar spectral lines
Vanadium
Wavelengths
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Summary:Vanadium-to-hydrogen ratios have been determined for o Peg, HR6127, HR465 (rare earth minimum), and HR8216. With respect to the solar system, vanadium is overabundant in the first two stars, possibly normal in the third, and underabundant in the fourth. The range in the V/H ratio in these four stars is between one and two orders of magnitude. An intercomparison of the four spectra shows that the strong V ð lines occur in the stars with weaker Cr and Fe spectra. The vanadium anomaly is thus suggestive of the well-known calcium anomaly in peculiar A stars, but we believe that vanadium and calcium abundances are not closely correlated.
ISSN:0004-6280
1538-3873
DOI:10.1086/130379