Fig. 4.
H2 excitation diagram of the diffuse molecular cloud towards J1513+0352 (red) compared with other environments (typical diffuse ISM in the Milky Way (MW) shown as empty squares, the high-excitation case next to the bright star HD 34078 shown with a plus sign; and two other ESDLAs, towards J0843+0221 (blue) and J2140−0321 (green)). The red line shows the best fit to the J = 0,1 and 2 rotational levels towards J1513+0352, indicating Tk = 92 ± 3 K.
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