Results obtained from RADEX modeling for ¹²CO and ¹³CO at the mid-J CO peak (Δα = −13.0′′, Δ δ = 8.0′′), at Her 36 (Δα = 0′′, Δ δ = 0′′) and at the [C II] peak (Δα = 30.0′′, Δ δ = −2.0′′). Our observed data points are in green, red, and blue and are extracted from peak temperature maps convolved to the same resolution of 31′′. The column densities used in the modeling are for ¹²CO 4 × 10¹⁸ cm⁻² and 8 × 10¹⁶ cm⁻² for ¹³CO. Panels a and b: results obtained by varying the kinetic temperature from 50–250 K in steps of 50 K and keeping the density fixed at 10⁵ cm^–3; panels c and d: results obtained by varying the H2 density from 10⁴–10⁸ cm^–3 in steps by a factor of 10 and keeping the kinetic temperature fixed at 120 K.