Chemical pumping from formation and destruction processes significantly enhances CH+ ro-vibrational populations and emission lines in NGC 7027 beyond radiative and inelastic collisions alone.
The formation tempera- tureT form was taken as 2/3×(E H2(v,J)−∆H o 0), as observed and recommended by Faure et al
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Chemistry and ro-vibrational excitation of CH$^+$ in the planetary nebula NGC 7027
Chemical pumping from formation and destruction processes significantly enhances CH+ ro-vibrational populations and emission lines in NGC 7027 beyond radiative and inelastic collisions alone.