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Table 2

Selected regions for the chemical model.

Point Offset Vel N(C18O) X(CN) X(N2H+) X(o-C3H2)1 X(CS) [CN]/[N2H+] [CS]/[N2H+] [CN]/[CS]
() (km s-1) (×1016 cm-2) (×10-9) (×10-11) (×10-10) (×10-10)

GP1 +12.1 +4.1 327.4 2.2 0.9 3.0 3.2 3.0 33 12 3.0
GP2 +11.6 +1.0 289.0 1.8 1.0 2.8 2.6 3.2 41 13 3.3
GP3 +6.6 –0.8 263.4 1.8 1.4 3.0 3.0 3.8 49 14 3.7
GP4 –5.1 –2.0 97.0 0.9 3.0 4.3 2.6 3.5 80 11 7.4
GP5 –10.4 –4.7 97.0 1.9 1.4 3.2 2.4 2.6 49 11 4.8
GP6 –21.1 –5.6 84.2 2.1 0.8 3.1 1.5 1.8 28 7 3.8
SS1 –1.2 –2.0 173.8 1.0 2.0 4.8 3.1 2.9 47 8 6.2
SS2 –2.6 –7.8 161.0 0.6 0.9 3.8 1.4 1.1 28 4 7.5
SS3 –9.4 –7.6 148.2 1.4 0.5 2.7 1.4 1.0 19 5 4.2
SS4 –13.3 –2.9 148.2 1.5 0.9 2.7 2.2 2.4 38 5 4.0
SS5 –2.8 –2.5 135.4 1.1 2.4 4.2 2.6 2.6 66 10 8.3
CN1 +4.0 +2.0 327.4 0.3 2.0 <4.0* <3.0* 1.8 >50 >4 9.8

Notes. Relative abundances wrt. H2;

(1)

contaminated with methanol (see text);

(*)

3σ limit.

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