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Table 4

CO-normalized abundances ( × 104) and enhancement factors with respect to dense core abundances1.

L1448 I04166
s-wing f-wing EHV s-wing f-wing EHV
MOLEC    X f enh    X f enh    X f enh    X f enh    X f enh    X f enh
SiO2 2.4 4.0 × 103 6.4 1.1 × 104 11 1.9 × 104 1.8 3.1 × 103 7.3 1.2 × 104 12.5 2.1 × 104
SO 18 2.7 × 102 19 2.9 × 102 19 2.9 × 102 18 2.8 × 102 24 3.7 × 102 23 3.5 × 102
CS 5.5 7.9 11 17 1.2 1.7 3.2 4.7 9.3 13 1.7 2.4
CH3OH 79 5.7 × 102 69 5.0 × 102 28 2.0 × 102 80 5.8 × 102 54 3.9 × 102 20 1.4 × 102
HC3N 2.0 13 3.2 21  < 1.8  < 11  < 3.1  < 20  < 3.3  < 22  < 1.7  < 10
HCO+ 0.93 2.0 0.95 1.9 0.88 1.8 0.4 0.8 1.3 2.5 0.9 1.9
p-H2CO3 1.9 27 1.0 14 0.40 5.5 2.8 39  < 0.4  < 5.7  < 1.4  < 22
HCN 9.7 9.1 22 20 2.1 2.0 4.9 4.6 23 21 0.88 0.82

Notes.

(1)

X/N(CO), and fenh as defined in Sect. 4.3;

(2)

the assumed SiO abundance in cores is the upper limit suggested by Ziurys et al. (1989): 5 × 10-12;

(3)

an ortho-to-para ratio of 3 was assumed for H2CO.

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