Table A.1
Observations and model results for fractional abundances at 106 yr.
| PAH postion (i.e. IR-edge) | PDR position (i.e. IR-peak) | Core position | ||||
| Obs. | This work | Obs. | This work | Obs. | This work | |
| AV (mag) | ≃0.05a | 0.05 | ≃1.5a | 1.5 | ≃[8–10]b | 8 |
|
|
||||||
| Species | ||||||
|
|
||||||
| O | – | 2.9(−4) | – | 2.7(−5) | – | 4.5(−9) |
| O2 | – | 5.0(−12) | – | 1.4(−9) | – | 2.6(−11) |
| O3 | – | 1.0(−6) | – | 5.8(−17) | – | 1.7(−15) |
| OH | – | 2.3(−9) | – | 1.7(−8) | – | 2.8(−9) |
| H2O | – | 9.9(−10) | – | 4.7(−8) | – | 1.2(−9) |
| OH+ | – | 2.0(−11) | – | 8.6(−15) | – | 3.5(−16) |
| H2O+ | – | 2.1(−11) | – | 3.2(−14) | – | 3.1(−15) |
| H3O+ | – | 2.6(−11) | – | 1.6(−12) | – | 3.6(−11) |
|
|
||||||
| C | – | 5.9(−8) | – | 3.4(−6) | – | 5.6(−8) |
| CO | – | 1.0(−9) | 1.9(−7)c | 1.3(−4)† | – | 1.3(−7) |
| C+ | – | 1.4(−4) | – | 7.6(−7) | – | 2.5(−10) |
| CO+ | – | 2.2(−12) | ≤5.0(−13)c | 1.7(−13) | – | 3.0(−17) |
| HCO+ | – | 8.2(−12) | 9.0(−10)c | 6.1(−11) | 3.9(−9)c | 8.6(−11) |
| HOC+ | – | 1.4(−11) | 4.0(−12)c | 3.0(−11) | – | 4.2(−14) |
|
|
||||||
| HCO | – | 2.4(−15) | 8.4(−10)c | 1.5(−10) | <8.0(−11)c | 2.5(−10) |
| H2CO | – | 3.4(−13) | 2.9(−10)c | 1.9(−9) | 2.0(−10)c | 5.6(−10) |
| CH3OH | – | 2.8(−13) | 1.3(−10)c | 4.2(−9) | 2.3(−10)c | 2.1(−10) |
| HCOOH | – | 2.8(−15) | 5.2(−11)c | 2.6(−15) | 1.4(−11)c | 2.8(−15) |
| CH2CO | – | 2.0(−20) | 1.5(−10)c | 2.9(−12) | 4.9(−11)c | 6.7(−13) |
| CH3CHO | – | 1.7(−20) | 2.4(−11)c | 1.6(−12) | 6.8(−11)c | 2.2(−13) |
| CH3CCH | – | 3.5(−24) | 4.4(−11)c | 1.3(−13) | 3.0(−10)c | 9.2(−11) |
| CH3O | – | 1.1(−17) | – | 5.6(−12) | – | 2.0(−13) |
| CH3OCH3 | – | 1.4(−19) | – | 8.7(−17) | – | 1.7(−15) |
| HCOOCH3 | – | 4.7(−27) | – | 2.4(−20) | – | 2.4(−15) |
|
|
||||||
| C2H | [ 1.3 − 9.0 ](−8)a | 7.8(−13) | [ 1.9 − 5.9 ](−9)a | 4.6(−9) | <1.8(−9)a | 1.3(−8) |
| c–C3H | – | 2.7(−17) | [ 0.37 − 2.2 ](−10)a | 2.8(−10) | [ 0.74 − 4.1 ](−11)a | 1.9(−9) |
| l–C3H | – | 5.7(−18) | [ 0.92 − 5.4 ](−11)a | 7.1(−11) | [ 1.3 − 7.5 ](−12)a | 6.0(−10) |
| c–C3H2 | (3.0 ± 2.0)(−9)a | 1.1(−16) | [ 0.78 − 2.9 ](−10)a | 4.4(−10) | [ 8.4 − 2.6 ](−11)a | 1.5(−9) |
| l–C3H2 | – | 2.1(−18) | [ 0.77 − 4.5 ](−11)a | 4.3(−11) | [ 0.83 − 4.6 ](−12)a | 2.2(−10) |
| l–C3H+ | [ 1.2 − 7.2 ](−11)a | 1.8(−15) | [ 0.2 − 1.4 ](−11)a | 6.4(−13) | <1.7(−12) a | 9.4(−14) |
| C4H | 5.2(−9)d | 3.7(−18) | 1.9(−9)d | 8.7(−11) | 3.7(−10)d | 2.2(−9) |
| CH4 | – | 1.6(−13) | – | 3.5(−8) | – | 2.3(−7) |
| C6H | – | 4.2(−17) | 2.2(−11)c | 7.9(−13) | – | 2.8(−10) |
| CH+ | – | 3.3(−12) | – | 1.7(−13) | – | 3.3(−15) |
CH |
– | 3.7(−11) | – | 1.2(−10) | – | 5.8(−11) |
C2H |
– | 2.3(−17) | – | 6.2(−13) | – | 4.4(−11) |
|
|
||||||
| N | – | 7.9(−5) | – | 2.5(−5) | – | 1.3(−8) |
| CN | – | 1.4(−10) | – | 1.2(−7) | – | 1.8(−9) |
| NO | – | 2.9(−12) | – | 3.7(−9) | – | 1.4(−10) |
| NH3 | – | 1.3(−10) | – | 7.9(−9) | – | 1.2(−8) |
| HCN | – | 4.3(−12) | – | 5.6(−9) | – | 3.4(−9) |
| HNC | – | 4.2(−12) | – | 2.5(−9) | – | 2.7(−9) |
| C3N | – | 9.0(−20) | 5.0(−11)e | 3.6(−11) | 1.5(−11)e | 4.5(−11) |
| HC3N | – | 6.8(−21) | 6.3(−12)c | 3.1(−12) | 7.9(−12)c | 1.2(−10) |
| HC5N | – | 1.8(−20) | – | 4.3(−14) | – | 2.2(−11) |
| CH3CN | – | 5.5(−20) | 2.5(−10)c | 3.6(−13) | 7.9(−12)c | 1.5(−11) |
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| S+ | – | 3.5(−6) | – | 3.0(−6) | – | 3.6(−10) |
| CS | – | 1.4(−14) | 2.0(−9)c | 1.9(−8) | 2.9(−9)c | 7.3(−9) |
| HCS+ | – | 3.0(−15) | 1.7(−11)c | 2.9(−11) | 1.2(−11)c | 2.7(−11) |
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| CF+ | – | 9.8(−11) | 5.7(−10)c | 1.1(−12) | <6.9(−11)c | 1.0(−15) |
Notes. Numbers in parentheses are powers of 10. Molecules in boldface correspond to those discussed in Sect. 3.
Values from Guzman et al. (2015);
values from Pety et al. (2012) and Gerin et al. (2009b);
observed values from Guzman et al. (2014) and references therein;
note that the CO modeled value is for the specific AV of 1.5 mag shown here, but our model also predicts a CO abundance between 10-7 and 10-6 in the AV range 0.3 − 0.5 mag;
observed values from Pety et al. (2005);
observed values from Agúndez et al. (2008).
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