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Carbon, nitrogen, and oxygen abundances in M67 giants

Jeffery A. Brown

Open publisher page 35 citations

Abstract

C, N, and O abundances are presented for three giants in M67. The abundances were determined by model atmosphere analysis of high-resolution spectra of the C2 1-0 and Δυ = 0 Swan band features, the [O I] 6300 Å line, and CN red system lines. The three giants are of identical composition, except possibly for 12C/13C ratio, and are similar to low-mass giants in the field. The abundance results are log ɛ(C) = 8.3, log ɛ(N) = 8.35, and log ɛ(O) = 8.7.

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What this paper is about

C, N, and O abundances are presented for three giants in M67. The abundances were determined by model atmosphere analysis of high-resolution spectra of the C2 1-0 and Δυ = 0 Swan band features, the [O I] 6300 Å line, and CN red system lines. The three giants are of identical composition, except possibly for 12C/13C ratio, and are similar to low-mass giants in the field. The abundance results are log ɛ(C) = 8.3, log ɛ(N) = 8.35, and log ɛ(O) = 8.7.

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Available abstract

C, N, and O abundances are presented for three giants in M67. The abundances were determined by model atmosphere analysis of high-resolution spectra of the C2 1-0 and Δυ = 0 Swan band features, the [O I] 6300 Å line, and CN red system lines. The three giants are of identical composition, except possibly for 12C/13C ratio, and are similar to low-mass giants in the field. The abundance results are log ɛ(C) = 8.3, log ɛ(N) = 8.35, and log ɛ(O) = 8.7.

Key concepts: Physics, Astrophysics, Stars, Giant star, Abundance (ecology), Nitrogen, Stellar atmosphere, Oxygen

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