Compositional differences among 'normal' A stars inferred from high-resolution spectroscopy

Details Compositional differences among 'normal' A stars inferred from high-resolution spectroscopy Compositional differences among 'normal' A stars inferred from high-resolution spectroscopy

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...163..333h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 163, no. 1-2, July 1986, p. 333-336.

Astronomy and Astrophysics

Astrophysics

29

A Stars, Astronomical Spectroscopy, Stellar Composition, Stellar Spectra, Barium, Carbon, Helium, Iron, Magnesium, Spectral Line Width

Scientific paper

A previous study of sharp-lined B 9.5-A 2 V stars classified as normal to ten additional objects, including Sirius (A 1 Vm) is extended. The occurrence of significant star-to-star abundance variations is confirmed. Elements studied are He, C, Mg, Ti, Fe, and Ba. Variations of the iron group and of magnesium or barium are generally correlated, but carbon varies independently. Anomalously strong He I lines are found in HR 3963 (A 0 V), which may be an intermediate helium star. Another star (HR 4138) with very sharp lines has been found.

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