Continuation of Fig. 4 for IRAS23385 (H I transitions 6–5, 8–6, 7–6) and G28P1A (H I 7–6). Left: line moment 0 maps. The channels used to integrate the emission are those encompassed by the line Gaussian fits in the right panels. Red apertures enclose the map area used to extract the spectra at the protostars shown in right panels (upper insets), while the broader grey aperture (minus the central red aperture) is used to extract the spectra of the local background (right panels, lower insets). Right: Gaussian curves fit the line emission for both protostar (red, upper inset) and backgrounds (grey, lower insets). We reproduce the Gaussian fits of the background in upper insets to allow comparisons with the protostar Gaussian fit.