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Table C.1

Rate coefficients for the reactions considered in this work (from Wakelam et al. 2012 for H2 abstraction reactions, and from Hollenbach et al. 2012 for photoionization and photodissociation).

Dissociative recombination rates
model 1 (100 K) model 2 (15 K)
[cm3s-1]

OH+(e,H)O 6.58 × 10-8 1.47 × 10-8
H3O+(e,H)OH 5.54 × 10-7 1.43 × 10-6
H3O+(e,H2)H2O 1.91 × 10-7 4.92 × 10-7

H2 abstraction reactions
[cm3s-1]

OH+(H2,H)H2O+ 1.1 × 10-9
H2O+(H2,H)H3O+ 6.1 × 10-10

Photodissociation rates (χ = 1.7 Habing)
model 1 (AV = 0.2) model 2 (AV = 1.0)
[s-1]

H2O(hν,H)OH 5.3 × 10-10 1.4 × 10-10
H2O(hν,H2)O 3.1 × 10-11 5.3 × 10-12
OH(hν,H)O 2.8 × 10-10 7.1 × 10-11

Photoionization rates (χ = 1.7 Habing)
model 1 (AV = 0.2) model 2 (AV = 1.0)
[s-1]

H2O(hν,ee)H2O+ 1.4 × 10-11 6.3 × 10-13
OH(hν,e)OH+ 9.8 × 10-12 3.8 × 10-13

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