2020/04/30 by Y. Wang, Yixin Wang, Alec Owens +5
Chemistry · Physics and Astronomy · #Astrophysics and Star Formation Studies #Basis set #Emission spectrum #Energy (signal processing) #Energy transfer #Excitation #Laser #Molecular Spectroscopy and Structure #Molecule #Set (abstract data type) #Spectral line #Stellar, planetary, and galactic studies #astro-ph.EP #astro-ph.SR #physics.atom-ph #physics.chem-ph
paper · pdf · doi:10.3847/1538-4365/ab85cb
published as Astrophys. J. Suppl. Ser., 248, 9 (2020)
openalex publication_date 2020/04/30 · openalex created_date 2020/05/13 · arxiv created 2020/05/28 · arxiv updated 2020/06/01 · openalex updated_date 2026/08/05
Abstract The calcium monohydroxide radical (CaOH) is an important astrophysical molecule relevant to cool stars and rocky exoplanets, among other astronomical environments. Here, we present a consistent set of highly accurate rovibronic (rotation-vibration-electronic) energy levels for the five lowest electronic states ( , , , , and ) of CaOH. A comprehensive analysis of the published spectroscopic literature on this system has allowed 1955 energy levels to be determined from 3204 rovibronic experimental transitions, all with unique quantum number labeling and measurement uncertainties. The data set covers rotational excitation up to J = 62.5 for molecular states below 29,000 cm −1 . The analysis was performed using the Measured Active Rotational-Vibrational Energy Levels algorithm, which is a robust procedure based on the theory of spectroscopic networks. The data set provided will significantly aid future interstellar, circumstellar, and atmospheric detections of CaOH, as well as assist in the design of efficient laser cooling schemes in ultracold molecule research and precision tests of fundamental physics.