Gas and dust temperatures toward Gy 3–7. Left: CO rotational temperature map obtained using Boltzmann diagrams. White contour map shows the CO 17–16 emission at 25%, 50%, 75%, and 95% of the emission peak. Right: H₂ column density contour map overlaid on the dust temperature map derived from the ppmap tool with the Herschel/Hi-GAL survey (Marsh et al. 2017). Contour levels of the N(H₂) are at (5, 10, 30, 50, 55) × 10²¹ cm⁻².