Is stripping of polycyclic aromatic hydrocarbons a route to molecular hydrogen

摘要: Though molecular hydrogen is the most abundant species in space, no global expalnation for its formation interstellar medium has been proposed. The actual understanding of process relies upon recombintion atoms presence a third body, generally an grain.In present note we report results quantum mechanical calculations which suggest that can be formed by reaction between and positively charged PAHs, resulting simultaneous dehydrogenation aromatic ions. Since regeneration original cation addition atomic to dehydrogenated positive ion thermodynamically allowed, cycled. study shows another possible aspect PAHs puzzeling role. It suggests may important partner catalytic insterstellar medium.