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1989•Publications of the Astronomical Society of JapanRequires access

Abundances of Nitrogen and Sulfur in A-Type Stars

Kozo Sadakane, Masami Okyudo

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Abstract

Abstract Abundances of nitrogen and sulfur have been obtained for 12 early A-type stars. Four Am and two Ap stars were included in the sample, and neutral lines of N and S in the infrared region were used. The abundances of both N and S in normal A-type stars were found to coincide with the solar values within ±0.5 dex. Nitrogen is slightly overabundant in the Am star o Peg. Nitrogen and sulfur are both under-abundant in the two Ap stars ε UMa and 73 Dra.

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Abstract Abundances of nitrogen and sulfur have been obtained for 12 early A-type stars. Four Am and two Ap stars were included in the sample, and neutral lines of N and S in the infrared region were used. The abundances of both N and S in normal A-type stars were found to coincide with the solar values within ±0.5 dex. Nitrogen is slightly overabundant in the Am star o Peg. Nitrogen and sulfur are both under-abundant in the two Ap stars ε UMa and 73 Dra.

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Available abstract

Abstract Abundances of nitrogen and sulfur have been obtained for 12 early A-type stars. Four Am and two Ap stars were included in the sample, and neutral lines of N and S in the infrared region were used. The abundances of both N and S in normal A-type stars were found to coincide with the solar values within ±0.5 dex. Nitrogen is slightly overabundant in the Am star o Peg. Nitrogen and sulfur are both under-abundant in the two Ap stars ε UMa and 73 Dra.

Key concepts: Physics, Stars, Sulfur, Nitrogen, Astrophysics, Astronomy, Chemistry, Organic chemistry

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