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Table 2

Column densities and abundances.

Species Line N/ ∫ τdυa Na Xb
(1013 cm−2/ km s−1) (1011 cm−2) (10−10)
CS 1−0 1.30 26 ± 3 30±3
C34S 1−0 1.33 0.96 ± 0.1 1.1 ± 0.1
13CS 1−0 1.42 0.25 ± 0.06 0.29 ± 0.07
HCS+ 1−0 1.62 0.94 ± 0.2 1 .1 ± 0.25
CCS 23−12 1.87 0.47 ± 0.1 0.5 ± 0.1
p-H2CS 101−000 3.26 0.31 ± 0.07 0.37 ± 0.08
1-C3H 3/2 −1/2 2.92 2.0 ± 0.1 2.3 ± 0.2
C3H+ 2−1 0.82 0.29 ± 0.06 0.34 ± 0.07
o-1-C3H2 212−111 1.13 0.84 ± 0.15 0.98 ± 0.2
o-1-C3H2 211−110 1.12 0.84 ± 0.15 0.98 ± 0.2
p-1-C3H2 202−101 0.41 0.25 ± 0.02 0.29 ± 0.03
p-c-C3H2 211−102 4.08 2.5 ± 0.4 3 ± 0.5
C4H 4−3 6.61 5.35 ± 0.02 6.2 ± 0.3
C4H 5−4 7.94 5.21 ± 0.05 6.2 ± 0.3
p-H2CCO 202−101 4.19 0.54 ± 0.14 0.62 ± 0.15
o-H2CCO 212−111 9.58 1.9 ± 0.2 2.2 ± 0.2
o-H2CCO 211−110 9.50 1.9 ± 0.2 2.2 ± 0.2
E-CH3CHO 202−101 2.88 1.29 ± 0.09 1.5 ± 0.1
A-CH3CHO 202−101 2.80 1.35 ± 0.09 1.6 ± 0.1
A-CH3CN 20−10 0.64 0.19 ± 0.02 0.21 ± 0.02
E-CH3CN 21 −11 0.75 0.18 ± 0.02 0.21 ± 0.02
HC3N 4−3 1.20 0.2 ± 0.04 0.3 ± 0.1
HC3N 5−4 1.38 0.4 ± 0.1 0.3 ± 0.1
HNCO 202−101 3.09 0.48 ± 0.12 0.56 ± 0.15
SiOc 1−0 2.00c 0.96 ± 0.06c 1.1 ± 0.08c

Notes. (a) Assuming an excitation temperature of 3.3 K. (b)Abundance relative to H2 using N(H2)=8.6 × 1020 cm−2. (c) Assuming an excitation temperature of 6.5 K.

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