Vanadium abundances in early A stars

Details Vanadium abundances in early A stars Vanadium abundances in early A stars

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pasp...90..536c&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 90, Oct.-Nov. 1978, p. 536-542. NSF-supported research.

Astronomy and Astrophysics

Astronomy

6

A Stars, Abundance, Early Stars, Stellar Spectrophotometry, Vanadium, Atmospheric Models, Chromium, Hydrogen, Iron, Spectral Line Width

Scientific paper

Vanadium-to-hydrogen ratios have been determined for Omicron Peg, HR 6127, HR 465 (rare-earth minimum), and HR 8216. 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 II 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 the vanadium and calcium abundances are not believed to be closely correlated.

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