Comparison between JVLA, SCUBA, and ALMA-FAUST observations in CrA: Left: JVLA 3.5 cm map (green contours; Liu et al. 2014) superimposed on the SCUBA-2 map at 450 μm (colour map and grey contours; JCMT archive). The green contours are at [5, 10, 20]σ where 1σ = 8 μJy beam⁻¹, whilst the grey ones are the same as Fig. 1. Right: Zoom onto the arc (Fig. 2a). The blue-shaded area marks the 3σ thermal dust continuum emission taken from Fig. 1. The ALMA, JVLA, and SCUBA beams are shown in these panels in blue, green, and grey, respectively.