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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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