Recommendations from the raden data base for the electronic transition moments on diatomic molecules of astrophysical interest. I: C2, CH, and CN molecules

Abstract

Abstract Within the scope of the data base RADEN an analysis of the radiative parameters has been carried out for a number of astrophysically significant molecular systems. Result of the experimental studies and the ab initio calculations of transition dipole moments D(R), electronic fe and band fv′v″ oscillator strengths, and radiative lifetimes τnv1 have been analysed. Finally, the electronic transition moments D(R) are recommended for the Swan and Phillips systems of C2, the A2 Δ-X2II system of CH, and the red and violet systems of CN. The recommended functions provide the most reliable data at present and they should be used in preparing lists of molecular line parameters (to calculate gf-values).