Table 3
Results of the analysis.
| Species | Formula | Xin | XT20 | X/HC3N | χ2 | |
| [10-10] | [10-10] | [In] | [T20] | |||
|
|
||||||
| Detected cyanopolyynes | ||||||
|
|
||||||
| Cyanoacetylene | HC3N | 9 ± 1 | 0.13+0.03-0.04 | 1 | 1 | 0.8 |
| Cyanodiacetylene | HC5N | ≲0.8 | 0.110 ± 0.005 | ≲0.1 | 0.8+0.2-0.4 | 1.1 |
| Deuterated cyanoacetylene | DC3N | ≲0.4 | 0.049+0.002-0.003 | ≲0.04 | 0.4+0.1-0.2 | 1.9 |
|
|
||||||
| Undetected cyanopolyynes | ||||||
|
|
||||||
| Ethynylisocyanide | HCCNC | ≲ 7.5 | ≲ 0.10 | |||
| 3-Imino-1,2-propa-dienylidene | HNCCC | ≲ 1.2 | ≲ 0.01 | |||
| Cyanoacetylene, 13C | HCCC-13-N | ≲ 4.5 | ≲ 0.10 | |||
| Cyanoacetylene, 13C | HCC-13-CN | ≲ 4.5 | ≲ 0.09 | |||
| Cyanoacetylene, 13C | HC-13-CCN | ≲ 7.5 | ≲ 0.15 | |||
| Cyanoacetylene, 15N | HCCCN-15 | ≲ 1.5 | ≲ 0.15 | |||
| DNCCC | ≲ 1.5 | ≲ 0.04 | ||||
| Cyanodiacetylene, 13C | HCCCCC-13-N | ≲ 6.0 | ≲ 0.60 | |||
| Cyanodiacetylene, 13C | HCCCC-13-CN | ≲ 7.5 | ≲ 0.60 | |||
| Cyanodiacetylene, 13C | HCCC-13-CCN | ≲ 4 .5 | ≲ 0.45 | |||
| Cyanodiacetylene, 13C | HCC-13-CCCN | ≲ 7.5 | ≲ 0.75 | |||
| Cyanodiacetylene, 13C | HC-13-CCCCN | ≲ 6.0 | ≲ 0.60 | |||
| Cyanodiacetylene, 15N | HCCCCCN-15 | ≲ 7.5 | ≲ 0.75 | |||
| Cyanodiacetylene, D | DCCCCCN | ≲ 7.5 | ≲ 0.75 | |||
| Cyanohexatriyne | HC7N | ≲ 15 | ≲ 15 | |||
Notes. The first two columns report the species name and formula. Third and fourth columns report the values of the inner abundance Xin and the abundances at Tdust = 20 K XT20. Columns 5 and 6 report the values of the abundance ratios DC3N/HC3N and HC5N/HC3N in the inner region and where Tdust = 20 K, respectively. The last column reports the χ2 for the best fit of HC5N and DC3N (note that in this last case the χ2 is not reduced). The top half table lists the detected species, the bottom half table the upper limits to the abundance of undetected cyanopolyynes (see text, Sect. 4).
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