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Table 3

Model-dependent column density ratios of CN to HCN at protostar and off-source positions.

nH2 Tkin NCN /NHCN NCN/NHCN
(cm−3) (K) Protostars Off-source
104 50 1.57–5.55 0.85–3.79
104 100 1.40–4.98 0.76–3.40
104 200 1.33–4.70 0.72–3.21
104 300 1.32–4.66 0.71–3.18
104 400 1.45–5.13 0.78–3.50
104 500 1.56–5.53 0.85–3.77

105 50 1.85–6.55 1.00–4.67
105 100 1.87–6.23 1.01–4.52
105 200 2.01–7.12 1.09–4.86
105 300 2.14–7.60 1.16–5.18
105 400 2.22–7.87 1.20–5.37
105 500 2.27–8.02 1.23–5.47

106 50 2.52–8.93 1.37–6.10
106 100 2.84–10.04 1.54–6.85
106 200 3.17–11.22 1.72–7.65
106 300 3.33–11.80 1.80–8.05
106 400 3.01–10.67 1.63–7.28
106 500 2.75–9.73 1.49–6.64

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