H2O Masers in Star Forming Regions—A Model

How is the H2O produced The relevant reactions and the reaction rate coefficients (cm s ) are given in Table 7.2 (after Elitzur). 

X is the enhancement of the UV flux around 160 nm above the general interstellar field and the visual extinction. For a more detailed discussion see the paper by Elitzur, 1979 [117]. 

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