Line lists for TiO minor isotopologues for the A3Φ-X3Δ electronic transition

Abstract

The TiO A3Φ-X3Δ electronic transition (γ system) is a significant opacity source in M dwarf stars as well as in the atmospheres of hot Jupiter exoplanets. The minor isotopologues, 46TiO, 47TiO, 49TiO and 50TiO, specifically the 0–0 and 0–1 bands, have been analyzed, producing spectroscopic constants for the A3Φ (v = 0) state and line lists with line positions based on experiment. In total 8248 lines in the A3Φ-X3Δ transition were fitted, with wavenumbers ranging from 12,827 cm−1 to 14,172 cm−1 (780–706 nm) with J values from 1 to 70. The TiO emission spectrum used for the analysis was recorded at the McMath-Pierce Solar Telescope, operated by the National Solar Observatory at Kitt Peak, Arizona.