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.
, Sneden, C.
, Lawler, J.
, Den Hartog, E.
, Cowan, J.
and Nave, G.
Vanadium Transitions in the Spectrum of Arcturus, Astrophysical Journal, [online], https://doi.org/10.3847/1538-4365/aa9a41
(Accessed September 22, 2023)