2023/08/08 by Oliver Pearce, S. N. Yurchenko, Pearce, Oliver +3
Earth and Planetary Sciences · Physics and Astronomy · #Advanced Chemical Physics Studies #Astrophysics of Galaxies (astro-ph.GA) #Atmospheric Ozone and Climate #Atomic Physics (physics.atom-ph) #Atomic and Molecular Physics #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR)
paper · pdf · doi:10.48550/arxiv.2308.04153
openalex publication_date 2023/08/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Comprehensive and accurate rovibronic line lists for the X 1Σ+ and A 1Π states of 12C1H+ and 13C1H+ which should be applicable up to temperatures of 5000 K are presented. Available empirical potential energy curves and high-level ab initio dipole and transition dipole moment curves are used with the program LEVEL to compute rovibronic energy levels and Einstein A coefficients. Λ-doubling is incorporated into the energy levels and A-coefficients involving the A 1Π state using an empirical method. For 12C1H+, line positions are improved by using both laboratory and astronomical observational spectra as input to the MARVEL procedure. The 12C1H+ line list contains 1505 states and 34194 transitions over the frequency range of 0 - 33010 cm-1 (λ> 300 nm). Comparisons with observed astronomical and laboratory spectra give very good agreement. The PYT CH+ line lists and partition functions are available from the ExoMol database at www.exomol.com.