Temperature stratification in a molecular shock: Analysis of the emission of H2 pure rotational lines in IC443G

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Table 4

H₂ and ¹²CO column density measurements toward 6^h 16^m $42_{.}^{s} 6$ $42_.^{\rm{s}}6$ , 22°32′15″.

Beam size (″)	$N_{H_{2}} (10^{22} {cm}^{- 2})$ ${N_{{{\rm{H}}_2}}}\left( {{{10}^{22}}{\rm{c}}{{\rm{m}}^{ - 2}}} \right)$	$N_{1 2_{CO}} (10^{18} {cm}^{- 2})$ $\quad {N_{{\rm{1}}{2_{{\rm{CO}}}}}}\left( {{{10}^{18}}{\rm{c}}{{\rm{m}}^{ - 2}}} \right)$
10	${2.8}_{- 1.0}^{+ 1.5}$ $2.8_{ - 1.0}^{ + 1.5}$	–
15	${3.0}_{- 1.1}^{+ 1.6}$ $3.0_{ - 1.1}^{ + 1.6}$	–
20	${3.1}_{- 1.1}^{+ 1.6}$ $3.1_{ - 1.1}^{ + 1.6}$	–
25	${3.1}_{- 1.1}^{+ 1.6}$ $3.1_{ - 1.1}^{ + 1.6}$	–
30	${3.0}_{- 1.1}^{+ 1.6}$ $3.0_{ - 1.1}^{ + 1.6}$	1.1 ± 0.1
35	${2.9}_{- 1.0}^{+ 1.5}$ $2.9_{ - 1.0}^{ + 1.5}$	1.0 ± 0.1
40	${2.9}_{- 1.0}^{+ 1.5}$ $2.9_{ - 1.0}^{ + 1.5}$	0.9 ± 0.1

Notes. The H₂ measurements are derived from our thermal admix. ture SE description (see Sect. 5.2) at different resolutions (beam size 10–40″), taking into account the uncertainty on the gas minimum temperature, T_min. ¹²CO measurements are derived from Dell’Ova et al. (2020, there are no available measurements below $3 {0^{″}}_{.} 1$ $3{0''_.}1$ ).

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