Left panel: wide-field SMA 1.3-mm continuum map towards VLA1623. In this map the beam size is 0.7″  ×  0.4″, allowing the three components detected at the positions of VLA1623, Knot-A and Knot-B to be disentangled. The rms noise in the continuum map is 2.1 mJy/beam. Black contours are levels of 6.3 mJy/beam (3σ-level, dashed contour), then 5σ to 20σ levels by 5σ, and ultimately 30σ and 40σ levels. The two white arrows represent the opening angle (~30°) of the protostellar outflow according to CO low-resolution observations and knots of shocked H₂ emission (André et al. 1990; Dent et al. 1995). Right panel: blow-ups of the 1.3-mm continuum map towards the three detected sources. The positions (blue stars) and FWHMs (dashed ellipses) of the deconvolved sources modeled (see Table 1) are shown.