Vanadium Transitions in the Spectrum of Arcturus

Published

February 1, 2018

Author(s)

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

Abstract

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.

Citation

Astrophysical Journal

Volume

234

Issue

2

Pub Type

Journals

Download Paper

DOI Link

Keywords

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

Citation

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], https://doi.org/10.3847/1538-4365/aa9a41 (Accessed May 18, 2024)