Table 3
Summary of derived values of Ns and Tex.
| Species | Tex | Ns | X/CH3OH | X/H2 | ||
|---|---|---|---|---|---|---|
| (K) | (cm−1) | (%) | × 10−8 | |||
| 13CH3OH | 120 ± 15 | (9.2 ± 0.6) × 1016 | 1.7 ± 0.2 | 23.0 ± 1.5 | ||
| CH3C2H | 320 ± 90 | (3.8 ± 0.7) × 1016 | 0.7 ± 0.2 | 9.5 ± 1.8 | ||
| CH3CN | 270 ± 40 | (3.4 ± 0.3) × 1016 | 0.62 ± 0.07 | 8.5 ± 0.8 | ||
| CH3CN, v8=1 | 220 ± 40 | (4.3 ± 0.6) × 1016 | 0.8 ± 0.2 | 10.8 ± 1.5 | ||
| CH3CHO | 160 ± 125 | (1.5 ± 0.8) × 1016 | 0.3 ± 0.2 | 3.8 ± 2.0 | ||
| NH2CHO | 190 ± 35 | (1.0 ± 0.09) × 1016 | 0.18 ± 0.02 | 2.5 ± 0.3 | ||
| H2CS | 160 ± 10 | (4.3 ± 0.2) × 1016 | 0.78 ± 0.07 | 10.8 ± 0.5 | ||
| CH3OCH3 | 160 ± 15 | (1.3 ± 0.1) × 1017 | 2.4 ± 0.3 | 32.5 ± 2.5 | ||
| C2H5OH | 120 ± 45 | (7.6 ± 1.8) × 1016 | 1.4 ± 0.4 | 19.0 ± 4.5 | ||
| C2H3CN | 240 ± 105 | (6.2 ± 1.1) × 1015 | 0.11 ± 0.02 | 1.6 ± 0.3 | ||
| CH3OCHO | 310 ± 75 | (1.7 ± 0.3) × 1017 | 3.1 ± 0.6 | 42.5 ± 7.5 | ||
| aGg’(CH2OH)2 | 160 ± 130 | (3.0 ± 0.5) × 1016 | 0.6 ± 0.1 | 7.5 ± 1.3 | ||
| gGg’(CH2OH)2 | 140 ± 120 | (2.6 ± 0.6) × 1016 | 0.5 ± 0.2 | 6.5 ± 1.5 | ||
| SO2 | 150 ± 30 | (8.1 ± 1.9) × 1017 | 14.7 ± 3.6 | 203 ± 47.5 | ||
| CH3OH | [120] | [(5.5 ± 0.4) × 1018](a) | ≡100 | 1375 ± 100 | ||
| 33SO2 | [150] | (1.3 ± 0.8) × 10 |
0.3 ± 0.2 | 3.3 ± 2.0 | ||
| 34SO2 | [150] | (8.1 ± 1.8) × 1016 | 1.5 ± 0.4 | 20.3 ± 4.5 | ||
| SO18O | [150] | (7.6 ± 1.0) × 1015 | 0.14 ± 0.02 | 1.9 ± 0.3 | ||
| Tex (K) | Tex (K) | |||||
| [130] | [200] | [270] | [200] | |||
| H2CCO | – | 6.4 × 1015 | (9.2 ± 1.5) × 1015 | 1.3 × 1016 | 0.17 ± 0.03 | 2.3 ± 0.4 |
| HNCO | – | 5.5 × 1016 | (6.2 ± 1.3) × 1016 | 7.8 × 1016 | 1.2 ± 0.3 | 15.5 ± 3.3 |
| NS | – | 9.2 × 1015 | (1.2 ± 0.1) × 1016 | 1.7 × 1016 | 0.22 ± 0.02 | 3.0 ± 0.3 |
| C34S | – | 7.2 × 1015 | (8.1 ± 1.6) × 1015 | 1.0 × 1016 | 0.15 ± 0.03 | 2.1 ± 0.4 |
| t-HCOOH | – | 2.6 × 1016 | (4.3 ± 0.6) × 1016 | 5.5 × 1016 | 0.8 ± 0.2 | 10.8 ± 1.5 |
| SO | – | 6.2 × 1017 | (7.0 ± 1.5) × 1017 | 7.8 × 1017 | 12.7 ± 2.9 | 175 ± 37.5 |
| 34 SO | – | 1.4 × 1016 | (1.8 ± 0.5) × 1016 | 2.1 × 1016 | 0.4 ± 0.1 | 4.5 ± 1.3 |
| HC3 N, v = 0 | – | 1.0 × 1016 | (6.2 ± 2.2) × 1015 | 5.5 × 1015 | 0.11 ± 0.04 | 1.6 ± 0.6 |
| HC3 N, v7 = 2 | – | 1.4 × 1017 (c) | (2.5 ± 0.6) × 10 |
1.2 × 10 |
0.5 ± 0.2 | 6.3 ± 1.5 |
| HCC13 CN | – | 4.3 × 1014 | (3.8 ± 0.8) × 1014 | 4.3 × 1014 | 0.007 ± 0.002 | 0.10 ± 0.02 |
| HCCC15 N | – | 2.1 × 1014 | (1.8 ± 0.4) × 1014 | 1.8 × 1014 | 0.003 ± 0.001 | 0.05 ± 0.01 |
| HCC13 CN, v7 = 1 | – | 1.9 × 10 |
(8.1 ± 1.2) × 10 |
5.5 × 10 |
0.010 ± 0.002 | 0.21 ± 0.03 |
| C2 H5 CN | – | 5.6 × 1015 (b) | (6.4 ± 0.8) × 1015 (b) | 8.1 × 10 |
0.12 ± 0.02 | 1.6 ± 0.2 |
| CH3 COCH3 | – | 2.3 × 1016 (b) | (5.3 ± 0.5) × 1016 (b) | 1.4 × 10 |
1.0 ± 0.2 | 13.3 ± 1.3 |
| CH2 (OH)CHO | – | ≤ 8.4 × 1015 (e) | ≤ 1.1 × 1016 (e) | ≤1.5 × 1016(e) | ≤0.2 | ≤2.8 |
| O13 CS | – | 4.8 × 1015 | (5.5 ± 0.7) × 1015 | 6.2 × 1015 | 0.10 ± 0.01 | 1.4 ± 0.2 |
Notes. Values in square brackets are fixed. Column 3 (Ns) is the synthesised-beam-averaged column density. (a)Based on 13 CH3OH, assuming a 12 C/13C ratio of 60. (b)Column density derived assuming fixed Tex due to insufficient range of Eup of unblended lines. (c) Includes the vibrational correction factor of 1.17. (d)Includes the vibrational correction factor of 1.48. (e)Upper limit due to low signal-to-noise.
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