Table 7: Observed and modeled line emissivity ratios for Henize 2-10 and NGC 253 using PDR models.
E NGC 253 Henize 2-10
(erg cm-2 s-1 sr-1) observations observations
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(6-5)}$ $0.19\pm 0.076^{*}$ $0.22\pm 0.083^{*}$
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(7-6)}$ $0.27\pm 0.11^{*}$ $0.16\pm 0.064^{*}$
$\frac{^{12}{\rm CO}(6-5)}{^{12}{\rm CO}(7-6)}$ $1.38\pm 0.56^{*}$ $0.74\pm 0.29^{*}$
$\frac{^{12}{\rm CO}(1-0)}{^{13}{\rm CO}(1-0)}$ $12.73\pm 2.5^{*}$ $16.82\pm 6.2^{*}$
$\frac{^{12}CO(2-1)}{^{13}CO(2-1)}$ $14.44\pm 3.4^{*}$ $22.22\pm 6.1^{*}$
$\frac{^{12}{\rm CO}(3-2)}{^{13}{\rm CO}(3-2)}$ $10.61\pm 3.6^{*}$ $10.21\pm 4.7^{*}$
  Model Model
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(6-5)}$ 0.26 0.18
$\frac{^{12}{\rm CO}(3-2)}{^{12}{\rm CO}(7-6)}$ 0.34 0.15
$\frac{^{12}{\rm CO}(6-5)}{^{12}{\rm CO}(7-6)}$ 1.32 0.86
$\frac{^{12}{\rm CO}(1-0)}{^{13}{\rm CO}(1-0)}$ 15.42 15.07
$\frac{^{12}{\rm CO}(2-1)}{^{13}{\rm CO}(2-1)}$ 9.72 8.02
$\frac{^{12}{\rm CO}(3-2)}{^{13}{\rm CO}(3-2)}$ 7.92 6.27

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


Source LaTeX | All tables | In the text