OH mid-infrared emission as a diagnostic of H2O UV photodissociation - II. Application to interstellar photodissociation regions

Open Access

Fig. A.2

H₂O abundance as a function of temperature for different values of G₀/n_H The dashed lines are the abundances calculated for the ion–neutral route and the solid lines are the abundances calculated for the neutral–neutral route. This figure highlights the transition temperature between ion–neutral and neutral-neutral routes.

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