par Bernath, Peter ;Dodangodage, Randika;Liévin, Jacques
Référence The Astrophysical journal, 933, 1, 99
Publication Publié, 2022-07-01
Article révisé par les pairs
Résumé : 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.