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VANADIUM ABUNDANCES IN EARLY A STARS

CHARLES R. COWLEY, GUENTHER H. ELSTE and JANET L. URBANSKI
Publications of the Astronomical Society of the Pacific
Vol. 90, No. 537 (October 1978), pp. 536-542
Stable URL: http://www.jstor.org/stable/40677247
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
VANADIUM ABUNDANCES IN EARLY A STARS
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Abstract

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.

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