Ionised molecules in BCA photospheric model

Abstract

The dissociation equilibrium of ionized diatomic molecular species CO⁺, N O⁺, OH⁺, O₂⁺, N₂⁺, H₂⁺ in BCA photospheric model is considered. The abundances of these species are in the order H₂⁺, CO⁺, OH⁺, NO⁺, O₂⁺ and N₂⁺. the equivalent width of R (K=30) line of the (0-3) band belonging to the transition A ² ∏I - X²∑⁺ of CO⁺ is either 0.042 or 0.084 mA (cf.text) which shows that no detectible lines of CO⁺ occur in the photospheric spectrum.