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Table D.1

Abbreviated reaction list.

Reactiona A B C Reference

S + H2 → SH + H 4.20 × 10-10 0.00 10494.00 (1)c
SH + H2 → H2S + H 7.36 × 10-13 2.31 6862.00 (2)
SH + H → S + H2 1.39 × 10-10 –0.18 697.00 (1)
S + OH → SO + H 6.59 × 10-11 0.00 0.00 (3)
SH + O → SO + H 1.58 × 10-10 0.00 0.00 (3;4)
S+ + H2 → SH+ + H 2.20 × 10-10 0.00 9860.00 (5)c
S+ + H2 → H2S+ + hν 1.00 × 10-17 –0.20 0.00 (6)
SH+ + H2 → H2S+ + H 1.90 × 10-10 0.00 6380.00 (5)c
SH+ + H2 → H3S+ + hν 2.40 × 10-16 –0.80 0.00 (7)
SH+ + H → S+ + H2 1.10 × 10-10 0.00 0.00 (5)
H2S+ + H2 → H3S+ + H 1.40 × 10-11 0.00 2900.00 (5)c
H2S+ + H → SH+ + H2 2.00 × 10-10 0.00 0.00 (5)
H3S+ + H → H2S+ + H2 6.00 × 10-11 0.00 0.00 (5)
CS+ + H2 → HCS+ + H 4.50 × 10-10 0.00 0.00 (8)
S+ + CH → CS+ + H 6.20 × 10-10 –0.00 0.00 (9)c
SH+ + C → CS+ + H 9.90 × 10-10 0.00 0.00 (9)
1.40 × 10-9 0.00 0.00 (9)
2.60 × 10-9 0.00 0.00 (9)
SH+ + e → S + H 2.00 × 10-7 –0.50 0.00 (9)
H2S+ + e → SH + H 2.40 × 10-7 –0.72 0.00 (10)c
H2S+ + e → S + H + H 2.40 × 10-7 –0.72 0.00 (10)c
H2S+ + e → H2S + hν 1.10 × 10-10 –0.70 0.00 (9)
H3S+ + e → SH + H + H 3.02 × 10-7 –0.50 0.00 (11)
H3S+ + e → H2S + H 8.84 × 10-8 –0.50 0.00 (11; 12)
H3S+ + e → SH + H2 7.80 × 10-8 –0.50 0.00 (11; 12)
H3S+ + e → S + H2 + H 5.20 × 10-8 –0.50 0.00 (11; 12)
HCS+ + e → CH + S 7.86 × 10-7 –0.57 0.00 (13)
HCS+ + e → CS + H 1.84 × 10-7 –0.57 0.00 (13)
O + H2S → SH + OH 7.90 × 10-12 1.00 1737.00 (1)c
3.70 × 10-9 0.00 0.00 (14; 15)c

Photoprocessb ζ 0 γ Reference

S + hν → S+ + e 4.40 × 10-10 2.58 (16)
SH + hν → S + H 6.50 × 10-10 1.42 (16)
H2S + hν → SH + H 1.00 × 10-9 1.87 (16; 17)
H2S + hν → S + H2 1.00 × 10-9 1.87 (16; 17)
CS + hν → C + S 6.30 × 10-10 2.03 (16)
SO + hν → S + O 2.40 × 10-9 1.95 (16)
HCS+ + hν → CS+ + H 7.00 × 10-10 1.70 (18)

Notes.

(a)

Reaction rate coefficient k(T) = A(T/ 300 K)Bexp(−CK/T) cm3 s-1.

(b)

Rate ζ = ζ0exp(−γAV/ mag) s-1.

(c)

Value different from that adopted previously in the Meudon PDR code version 1.4.4.

Reference. (1) Manion et al. (2013); (2) Peng et al. (1999); (3) Demore et al. (1997); (4) Tsuchiya et al. (1994); (5) Millar et al. (1986); (6) Herbst et al. (1989); (7) Millar & Herbst (1990); (8) Decker et al. (2001); (9) Prasad & Huntress (1980); (10) Hellberg et al. 2005; (11) Abouelaziz et al. (1992); (12) Kaminska et al. (2008); (13) Montaigne et al. (2005); (14) Kim et al. (1974); (15) Anicich et al. (1975); (16) van Dishoeck et al. (1988); (17) van Dishoeck (2006); (18) estimate.

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