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Vanadium Transitions in the Spectrum of Arcturus



Michael P. Wood, Chris Sneden, James E. Lawler, E. A. Den Hartog, John J. Cowan, Gillian Nave


We derive a new abundance for vanadium in the bright, mildly metal-poor red giant Arcturus. This star has an excellent high-resolution spectral atlas and well-understood atmospheric parameters, and it displays a rich set of neutral vanadium lines that are available for abundance extraction. Using a newly recorded set of laboratory FTS spectra, we first confirm our earlier laboratory transition data and calibration method, especially to ensure that the V I parameters for the reddest transitions near 900 nm are in accord with those at shorter wavelengths. We then perform a synthetic spectrum analysis of weak V I features in Arcturus, deriving log ε(V) = 3.54 ± 0.01 (σ = 0.04) from 55 lines. There are no significant abundance trends with wavelength, line strength, or lower excitation energy. The very small line-to-line scatter supports the accuracy of our laboratory data for this species.
Astrophysical Journal


atomic data, stars: abundances, stars: individual (Arcturus)


Wood, M. , Sneden, C. , Lawler, J. , Den Hartog, E. , Cowan, J. and Nave, G. (2018), Vanadium Transitions in the Spectrum of Arcturus, Astrophysical Journal, [online], (Accessed June 22, 2024)


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Created February 1, 2018, Updated July 3, 2023