ALMA mosaic of the NGC 2024 core region at 225 GHz using the full baseline coverage, in grayscale in the background. Black circles indicate the positions of the disks in the Meyer (1996) catalog; red circles show the detected sources. The open red plus symbols indicate the locations of additional point sources not included in the catalog. The dark blue star symbol marks the position of IRS 2b. The eastern and western populations (Sect. 4.1) are separated by the thin black dashed line. Blue-shaded contours show the location of the dense molecular ridge containing the FIR 1-5 sources using Herschel PACS 160 μm data in unitsof Jy pixel⁻¹), from Stutz et al. (2013). The locations of FIR 1-5 are marked (from north to south) by green squares.