Dust continuum emission at 860 μm (colours and white contours) imaged with ALMA towards G023.01−00.41 and derivedfrom 52 MHz of emission-free band in the spectra. The upper wedge quantifies the continuum brightness from its peak to the maximum negative in the map; white contours are drawn at levels of 3, 10, and 20 times the 1 σ rms of 0.2 mJy beam⁻¹. The moment-zero map of the CH₃OH (14_1,13–14_0,14) A⁺ mission is overlaid with the same black contours of Figs. 1 and 2 for comparison. The synthesized ALMA beam is shown in the bottom left corner.