Table A.1
Reduced chemical network for the analytical derivation of DCO+/HCO+.
| Reaction | Reaction rate [cm3 s-1] | |||
| No. 1 | CR + H2 |
|
|
ζ [ s-1] |
| No. 2 | H2+ + H2 |
|
|
|
| No. 3 |
|
|
HCO+ + H2 | kH = 1.61 10-9 |
| No. 4 | HCO+ + e− |
|
CO + H |
|
| No. 5 | H3+ + e− |
|
H + H + H |
|
| H2+ H |
|
|||
| No. 6 | H + H |
|
H2 |
|
| No. 7 |
|
|
H2D+ + H2 | kf = 1.7 10-9 |
|
||||
| No. 8 | H2D+ + CO |
|
DCO+ + H2 | kD = 5.37 10-10 |
| No. 9 | DCO+ + e− |
|
CO + D |
|
| No. 10 | H2D+ + e− |
|
H + H + D |
|
| H2 + D |
|
|||
| HD + H |
|
|||
| No. 11 | H + D |
|
HD |
|
| No. 12 | H2D+ + CO |
|
HCO+ + H2 |
|
| No. 13 |
|
|
H2D+ + H |
|
|
||||
| No. 14 | CO+ + HD |
|
DCO+ + H | kCO+ = 7.5 10-10 |
Notes. The reduced network corresponds to the original description by Guélin et al. (1977) and Caselli et al. (1998). The rates of reactions 1−6 are contained in the original OSU 2009 network. We appended deuterated reactions 7−14 for which chemical rates are taken from Roberts & Millar (2000). Reaction 14 is only dominant in the HIP and is not involved in the analytical determination of DCO+/HCO+.
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