Table 4
Observations and model results for fractional abundances at 105 yr.
| Species | IR-edge | IR-peak | Cloud | |||
| Obs. | Mod. | Obs. | Mod. | Obs. | Mod. | |
|
|
||||||
| O (10-5) | 11 | 7.3 | 5.9 | |||
| N (10-6) | 16 | 1.1 | 1.3 | |||
| CN (10-8) | 2.3 | 1.0 | 0.2 | |||
| NO (10-9) | 0.07 | 77 | 103 | |||
| O2(10-7) | <0.01 | 7.2 | 62 | |||
| OH (10-7) | 0.01 | 1.8 | 1.3 | |||
| CO(10-5) | 6.0 | 9.6 | 9.9 | |||
| H2O(10-9) | 0.4 | 170 | 193 | |||
| C2H(10-8) | 3.3 | 1.6 | 3.0 | 0.3 | 0.2 | 0.07 |
| c-C3H(10-10) | 1.9 | 5.4 | 0.6 | 1.4 | ||
| l-C3H(10-10) | 1.0 | 2.9 | 8.0 | 0.9 | ||
| c-C3H2(10-10) | 13 | 2.3 | 11 | 10 | 0.4 | 2.3 |
| C4H(10-9) | 9.5 | 1.3 | 3.6 | 2.0 | 0.8 | 0.1 |
| CH4(10-9) | 0.03 | 33 | 50 | |||
| C6H(10-11) | 1.4 | 4.1 | 0.2 | |||
| HCO(10-10) | 0.03 | 17a | 0.1 | 0.2 | ||
| NH3(10-8) | <0.01 | 1.2 | 2.5 | |||
| HCN(10-10) | 0.8 | 40 | 26 | |||
| HNC(10-10) | 0.9 | 67 | 17 | |||
| HC3N(10-11) | <0.01 | 5.7b | 0.7 | 0.3 | ||
| HC5N(10-12) | <0.01 | 4 | 0.13 | |||
| CH+(10-12) | 5 | 0.02 | <0.01 | |||
| CO+(10-13) | ≤5c | 20 | 3.2 | 1.3 | ||
| HCO+(10-9) | 0.9d | 0.02 | 10 | 3.9d | 11 | |
| HOC+(10-12) | 4e | 6 | 73 | 27 | ||
| OH+(10-13) | 4 | 15 | 5 | |||
| H2O+(10-13) | 8 | 33 | 12 | |||
| H3O+(10-10) | 0.1 | 45 | 37 | |||
|
23 | 10 | 0.2 | |||
|
1.5 | 19 | 12 | |||
| CS(10-8) | 1.6f | 0.04 | 4.0f | 0.04 | 0.01 | |
| HCS+(10-11) | 0.07 | 4.0g | 0.08 | 0.1 | ||
Notes. The IR-edge is at AV = 1.56 ± 0.73, the IR-peak is at AV = 4.55 ± 1.7 and the Cloud region is at AV = 11.7 ± 4.1. The model results are for the high column-dependent ζ from Fig. 2. Observations are from Pety et al. (2005) unless otherwise noted.
HCO at AV ≈ 4 by Gerin et al. (2009).
HC3N observed at AV ≈ 4 by Teyssier et al. (2004).
Upper limit at AV < 2, from Goicoechea et al. (2009b).
HCO+ from H13CO+ at AV ≈ 2 and AV ≈ 10 by Gerin et al. (2009). The calculated abundance at AV = 3 is in close agreement with the observed edge value.
Observed at AV ≈ 2 by Goicoechea et al. (2009b).
For the IR-peak and IR-edge, from Teyssier et al. (2004).
HCS+ observed at AV ≈ 4 by Goicoechea et al. (2006).
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