Gas kinetic temperatures were determined by analyzing the H₂CO (3−2) line ratios from the central regions of the dense cores N44, N46, N48, and N54 (see Table 1), extending toward their respective edges. The format of the regression fits is $T_{\text{kin }}(\text{ cores })=\text{a}\times {\left(\frac{\text{R}}{\mathrm{arcsec}}\right)}^{\text{b}}$ K while the fitting method is the Levenberg-Marquardt method without the error of temperature, and the Reduced Chi-Squared values for N44, N46, N48, and N54 are 1.7, 3.3, 5.7, and 1.9, respectively. The average kinetic temperature at each projected distance is represented by green triangles. The green line represents the connection of the each average kinetic temperature, while the fitted results for H₂CO are depicted by black lines.