Table 3
Optical depths, excitation temperatures, column densities, and molecular abundances.
| Species | τ | Tex(K) | N(cm−2) | fX | Mark |
|---|---|---|---|---|---|
| HC3N | … | (a)8.6 ± 1.0 | (a)(2.89 ± 0.92) × 1013 | 2.91 × 10−9 | N,C |
| … | (a)37.0 ± 3.6 | (a)(6.73 ± 0.74) × 1012 | 6.79 × 10−10 | N,W | |
| SO | … | (a)20.3 ± 0.8 | (a)(1.65 ± 0.09) × 1014 | 1.66 × 10−8 | N |
| … | (a)26.5 ± 4.4 | (a)(1.03 ± 0.22) × 1015 | 1.27 × 10−7 | B | |
| C17O | … | (a)9.8 ± 0.6 | (a)(2.32 ± 0.22) × 1016 | 2.34 × 10−6 | N |
| … | 26.5 | (2.51 ± 0.28) × 1016 | 3.10 × 10−6 | B | |
| CH3OH | … | (a)21.3 ± 1.8 | (a)(3.09 ± 0.45) × 1014 | 3.12 × 10−8 | N |
| 13CO | 0.6 | 9.8 | (b) (1.30 ± 0.13) × 1017 | 1.31 × 10−5 | N |
| 0.1 | 26.5 | (b)(2.61 ± 0.26) × 1017 | 3.23 × 10−5 | B | |
| C18O | 0.2 | 9.8 | (b)(1.40 ± 0.15) × 1016 | 1.41 × 10−6 | N |
| 0.01 | 26.5 | (b)(4.59 ± 0.50) × 1016 | 5.68 × 10−6 | B | |
| SiO | … | 20.3 | (1.75 ± 0.22) × 1013 | 1.76 × 10−9 | N |
| … | 26.5 | (5.62 ± 0.31) × 1014 | 6.95 × 10−8 | B | |
| 30SiO | … | 20.3 | (5.19 ± 6.83) × 1011 | 5.23 × 10−11 | N |
| … | 26.5 | (8.70 ± 1.72) × 1013 | 1.08 × 10−8 | B | |
| HCN | 2.6 | 15.0 | (b)(1.39 ± 0.37) × 1014 | 1.40 × 10−8 | N |
| … | 26.5 | (1.09 ± 0.03) × 1015 | 1.35 × 10−7 | B | |
| H13CN | 0.7 | 15.0 | (b)(7.65 ± 0.21) × 1013 | 7.72 × 10−9 | N |
| … | 26.5 | (5.07 ± 2.02) × 1013 | 6.27 × 10−9 | B | |
| HNC | … | 15.0 | (4.37 ± 0.40) × 1013 | 4.41 × 10−9 | N |
| HN13C | … | 15.0 | (2.28 ± 0.27) × 1013 | 2.30 × 10−9 | N |
| HCO+ | … | 15.0 | (1.19 ± 0.03) × 1013 | (c)1.20 × 10−9 | N |
| … | 26.5 | (4.61 ± 0.13) × 1014 | (c)5.70 × 10−8 | B | |
| H13CO+ | … | 15.0 | (7.00 ± 0.25) × 1012 | 7.06 × 10−10 | N |
| … | 26.5 | (4.16 ± 0.79) × 1013 | 5.14 × 10−9 | B | |
| HC18O+ | … | 15.0 | (1.34 ± 0.25) × 1012 | 1.35 × 10−10 | N |
| SO2 | … | 20.3 | (3.09 ± 0.45) × 1014 | 3.12 × 10−8 | N |
| C2H | 1.7 | 15.0 | (b)(6.66 ± 0.44) × 1014 | 6.72 × 10−8 | N |
| p-H2CO | … | 15.0 | (d)(2.03 ± 0.78) × 1014 | 2.05 × 10−8 | N |
| … | 26.5 | (d)(3.97 ± 1.87) × 1014 | 4.91 × 10−8 | B | |
| o-H2CO | … | 15.0 | (1.84 ± 0.28) × 1013 | 1.86 × 10−9 | N |
| … | 26.5 | (9.64 ± 2.03) × 1013 | 1.19 × 10−8 | B | |
| c-C3H2 | … | 15.0 | (2.87 ± 0.14) × 1013 | 2.89 × 10−9 | N |
Notes. N and B represent the narrow and broad components, respectively. C and W represent the cold and warm components, respectively. (a)Derived from the rotation diagram analysis. (b)The optical depth effect has been corrected (see Sect. 3.4) (c)Taken from Deguchi et al. (2004). (d)The average of the values derived from the p-H2CO 
and 32,1 → 22,0 lines.
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