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

Abstract LaO bands are a characteristic feature in the spectrum of cool S-type stars. La is made primarily by s -process during asymptotic giant branch phase stellar evolution. The B 2 Σ + –X and A Π–X band systems can be used to determine abundances S with v ′ $v^{\prime\prime} \leqslant 5$?> ≤ 5 have been rotationally analyzed from an emission carbon furnace. Line strengths calculated using ab initio transition dipole function, corrected experimental lifetimes. We provide line list for system that abundances.