Table 1
Line spectroscopic parameters, and integrated flux density of the HC3N (9–8) and HC5N (31–30) lines extracted from the regions indicated in Fig. 1.
| Line | Eu | S μ2 | Integrated flux density | |||
|
|
||||||
| FIR4-total | FIR4-HC5N (red) | FIR4-lowHC5N (white) | FIR5 (blue) | |||
| K | D2 | Jy km s-1 | Jy km s-1 | Jy km s-1 | Jy km s-1 | |
|
|
||||||
| HC3N(9–8) | 19.6 | 124.8 | 6.0(0.6) | 4.0(0.4) | 2.0(0.2) | 0.46(0.05) |
| HC5N(31–30) | 63.4 | 581 | 0.29(0.03) | 0.25(0.03) | 0.050(0.007) | 0.072(0.009) |
|
|
||||||
| HC3N/HC5N | 4–12 | 10–30 | ≤6 | |||
Notes. Uncertainties are in brackets and include the calibration error on the absolute flux scale of the order of ~10%. The last row reports the calculated HC3N/HC5N abundance ratio, as computed in Sect. 3.
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