Overview of the Orion Bar. The (0″, 0″) position corresponds to α₂₀₀₀ = 05^h 35^m 20.1^s ; δ₂₀₀₀ = -05°25′07.0″. Left panel: integrated line intensity maps in the ¹³CO J = 3–2 (color scale) and SO 8₉–7₈ emission (gray contours; from 6 to 23.5 K km s⁻¹ in steps of 2.5 K km s⁻¹) obtained with the IRAM 30 m telescope at 8″ resolution. The white dotted contours delineate the position of the H₂ dissociation front as traced by the infrared H₂ v = 1–0 S(1) line (from 1.5 to 4.0 × 10⁻⁴ erg s⁻¹ cm⁻² sr⁻¹ in steps of 0.5 × 10⁻⁴ erg s⁻¹ cm⁻² sr⁻¹; from Walmsley et al. 2000). The black-dashed rectangle shows the smaller FoV imaged with ALMA (Fig. 3). The DF position has been observed with SOFIA, IRAM 30 m, and Herschel. Cyan circles represent the ~15″ beam at 168 GHz. Right panel: H₂S lines lines detected toward three positions of the Orion Bar.