a) SCUBA–850 μm dust emission (contours) overlaid on the 6 cm VLA continuum image. The contours correspond to 5, 10, 20, 40, 80, 160 Jy beam^-1. The red circle represents the Effelsberg FWHM beamsize (40′′). The red box represents the mapped region of Fig. 1b. b) Continuum map of Orion KL at 230 GHz from the ALMA-SV line survey modified from Fig. 8 of Crockett et al. (2014). The contour levels are 10%, 20%, 40%, 60%, and 80% of the peak intensity of 1.406 Jy beam^-1. The positions of source n, source I, SMA1 and the BN object are indicated by the purple squares. The position of the hot core south (HC(S)) is indicated by the blue circle. The positions of infrared sources IRc1, IRc2, IRc3, IRc4, IRc5, IRc6, and IRc7 are labeled by red crosses. Blue crosses indicate millimeter wave continuum sources. The approximate positions of the compact ridge and the HC are indicated by the red dashed circles and the acronyms CR and HC. (these sources are described in more details in Sect. 3.) The physical scale is given by the horizontal bar. The synthesized beam is shown in the lower left of the panel. The reference point corresponds to (α_J2000, δ_J2000) = (05^h35^m14.350^s, −05°22′35.00′′).