Dust continuum and emission of selected iCOM transitions toward IRAS 4A2. Left: 1.3 mm dust continuum emission in color scale and gray contours. The first contours and steps are 3σ (σ = 0.6 mJy beam⁻¹). The cyan star marks the IRAS 4A2 dust peak, 3^h29^m10^s.431 (RA) and +31° 13′32.″00 (Dec). The beam is 0.″20 × 0.″ 14 (–26°). Right: dust continuum (grayscale) overlaid with moment 0 contours maps of CH₃OH 16_(–2,15)–15_(–3,13) E (green), integrated over +3 to +10 km s⁻¹, CH₃CHO 13_(0,13)–12_(0,12) E [υ_t=2] (orange), integrated over +4 to +9 km s⁻¹, and CH₂OHCHO 34_(5,30)–34_(4,31) (blue), integrated over +6 to +8 km s⁻¹. The first contours and steps are 3 and 6σ respectively, with σ = 3.7 mJy beam⁻¹ km s⁻¹ for CH₃OH, σ = 2.7 mJy beam⁻¹ km s⁻¹ for CH₃CHO, and σ = 2.3 mJy beam⁻¹ km s⁻¹ for CH₂OHCHO. The beam is 0.″ 17 × 0.″ 12 (–28°).