Document Type
Article
Publication Date
2026
DOI
10.3847/1538-4357/ae6331
Publication Title
The Astrophysical Journal
Volume
1004
Issue
1
Pages
57
Abstract
An analysis of the B²Σ+ − X²Σ+ band system of ⁴⁵Sc¹⁶O is presented. ScO was excited in a hollow cathode discharge, and its Doppler-limited resolution spectrum was measured with a Fourier transform spectrometer. The spectroscopic constants of the B²Σ+ state with v ≤ 3 are reported, and equilibrium constants are derived. Ab initio transition dipole moment functions are calculated for the A²Π − X²Σ+ and B²Σ+ − X²Σ+ transitions and scaled using lifetime measurements. We report new line lists of hyperfine-resolved transitions for ⁴⁵Sc¹⁶O with recalculated Einstein A coefficients and oscillator strengths of the previously reported A²Π − X²Σ+ band system and new lines of the B²Σ+ − X²Σ+ band system. These line lists can be used to simulate the bands of ScO under various pressure and temperature conditions relevant for stellar environments such as the atmospheres of the M-type stars χ Cyg, o Ceti, and α Her.
Rights
© 2026 The Authors.
Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Any further distribution of this work must maintain attribution to the authors and the title of the work, journal citation and DOI.
Data Availability
Article states: "The tabular data (Tables 1, 6) and the data of Figure 3 created for this work are provided in machine-readable format. The PGOPHER (version 10.1.182) configuration file, containing the published spectroscopic constants and band strengths for both transitions, is available on Zenodo at doi:10.5281/zenodo.19542637."
Original Publication Citation
Lavy, L., Liévin, J., & Bernath, P. F. (2026). M-type star spectral analysis: ScO line list including the B2Σ+-X2Σ+ band system. Astrophysical Journal, 1004(1), Article 57. https://doi.org/10.3847/1538-4357/ae6331
ORCID
0000-0003-4572-8612 (Lavy), 0000-0002-5557-7486 (Liévin), 0000-0002-1255-396X (Bernath)
Repository Citation
Lavy, Léo; Liévin, Jacques; and Bernath, Peter F., "M-Type Star Spectral Analysis: ScO Line List Including the B²Σ⁺-X²Σ⁺ Band System" (2026). Chemistry & Biochemistry Faculty Publications. 392.
https://digitalcommons.odu.edu/chemistry_fac_pubs/392