S-Type Stars: LaO Line List for the B²Σ⁺-X²Σ⁺ Band System

Authors

P. F. Bernath, Old Dominion UniversityFollow
Randika Dodangodage, Old Dominion UniversityFollow
J. Liévin

Document Type

Article

Publication Date

2022

DOI

10.3847/1538-4357/ac731f

Publication Title

The Astrophysical Journal

Volume

933

Issue

1

Pages

99 (1-7)

Abstract

LaO bands are a characteristic feature in the spectrum of cool S-type stars. La is made primarily by the s-process during the asymptotic giant branch phase of stellar evolution. The B²Σ⁺–X²Σ⁺ and A²Π–X²Σ⁺ band systems can be used to determine the La abundances in cool S stars. The bands of the B²Σ+–X²Σ⁺ with v' and v" ⩽ 5 have been rotationally analyzed from an emission spectrum from a carbon furnace. Line strengths are calculated using an ab initio transition dipole function, corrected using experimental lifetimes. We provide a line list for the B²Σ⁺–X²Σ⁺ band system that can be used to determine La abundances.

Comments

© 2022 The Authors.

Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 Licence.

Original Publication Citation

Bernath, P.F., Dodangodage, R., Liévin, J. (2022) S-type stars: LaO line list for the B²Σ⁺-X²Σ⁺ band system. The Astrophysical Journal, 933 (1) 1-7, Article 99. https://doi.org/10.3847/1538-4357/ac731f

ORCID

0000-0002-1255-396X (Bernath), 0000-0003-4814-4970 (Dodangodage)

Repository Citation

Bernath, P. F.; Dodangodage, Randika; and Liévin, J., "S-Type Stars: LaO Line List for the B²Σ⁺-X²Σ⁺ Band System" (2022). Chemistry & Biochemistry Faculty Publications. 227.
https://digitalcommons.odu.edu/chemistry_fac_pubs/227