Fig. B.1.
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ALMA FAUST SiO velocity channel maps. Each panel corresponds to a 1 km s−1 increment from the systemic velocity (vsys = 6.8 km s−1; Choi 2001). The black star marks the position of the IRAS 4A2 protostar. The SiO beam is reported in the lower left corner of the vsys panel (shown in colour scale). First contours and steps are 3σ (σ = 1 mJy beam−1).
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