Table 4: Observed and predicted ("low $T_{\rm k}$'' and "high $T_{\rm k}$'' LVG models) line area ratios for Henize 2-10 and NGC 253.
A NGC 253 Henize 2-10
(K km s-1) observations observations
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(6-5)}$ $1.6\pm0.6^{*}$ $1.7\pm0.7^{*}$
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(7-6)}$ $3.3\pm1.3^{*}$ $2.0\pm0.8^{*}$
$\frac{^{12}{\rm CO}(6-5)}{^{12}{\rm CO}(7-6)}$ $2.1\pm0.8^{*}$ $1.2\pm0.5^{*}$
$\frac{^{12}{\rm CO}(1-0)}{^{13}{\rm CO}(1-0)}$ $11.5\pm2.2^{*}$ $14.9\pm5.8^{*}$
$\frac{^{12}{\rm CO}(2-1)}{^{13}{\rm CO}(2-1)}$ $13.0\pm3.0^{*}$ $19.2\pm5.8^{*}$
$\frac{^{12}{\rm CO}(3-2)}{^{13}{\rm CO}(3-2)}$ $9.1\pm3.1^{*}$ $8.9\pm3.8^{*}$
  "Low $T_{\rm k}$'' model "Low $T_{\rm k}$'' model
  $T_{\rm k}=70$ K $T_{\rm k}=50$ K
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(6-5)}$ 1.6 2.0
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(7-6)}$ 2.5 3.8
$\frac{^{12}{\rm CO}(6-5)}{^{12}{\rm CO}(7-6)}$ 1.5 1.9
$\frac{^{12}{\rm CO}(1-0)}{^{13}{\rm CO}(1-0)}$ 25.5 19.1
$\frac{^{12}{\rm CO}(2-1)}{^{13}{\rm CO}(2-1)}$ 13.4 9.9
$\frac{^{12}{\rm CO}(3-2)}{^{13}{\rm CO}(3-2)}$ 10.1 8.1
  "High $T_{\rm k}$'' model "High $T_{\rm k}$'' model
  $T_{\rm k}=150$ K $T_{\rm k}=100$ K
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(6-5)}$ 1.4 1.6
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(7-6)}$ 1.8 2.5
$\frac{^{12}{\rm CO}(6-5)}{^{12}{\rm CO}(7-6)}$ 1.3 1.5
$\frac{^{12}{\rm CO}(1-0)}{^{13}{\rm CO}(1-0)}$ 15.1 23.9
$\frac{^{12}{\rm CO}(2-1)}{^{13}{\rm CO}(2-1)}$ 20.7 14.8
$\frac{^{12}{\rm CO}(3-2)}{^{13}{\rm CO}(3-2)}$ 14.8 9.9

* Ratio derived from observations marked with asterisks in Tables 2 and 3.


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