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Table 8

Molecular abundances, X, with respect to H2.

Region Species X (this work) X (other works)
(×10-10) (×10-10)

Extended HC3N 10 ...
ridge(a) DC3N ... ...
HC5N 0.66 ...

Compact HC3N 27 20(1)
ridge(b) DC3N 0.36 ...
HC5N 0.40 ...

HC3N 33 24(2)
Plateau(c) DC3N ... ..
HC5N ... ..

High- HC3N 81 ...
velocity DC3N ... ...
plateau(d) HC5N ... ...

Hot HC3N 40 18(2)
core(e) DC3N 0.36 ...
(HC1+HC2) HC5N 1.7 ...

Notes.Derived molecular abundances assuming.

(a)

NH2 = 7.5 × 1022 cm-2,

(b)

NH2 = 7.5 × 1022 cm-2,

(c)

NH2 = 2.1 × 1023 cm-2,

(d)

NH2 = 6.2 × 1022 cm-2, and

(e)

NH2 = 4.2 × 1023 cm-2.

Reference. (1) Morris et al. (1976); (2) Sutton et al. (1995).

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