(a) Colour image (same colour mapping as in Fig. 2) showing H2 emission from MHO 1639 in the cloud (red) and the two bow shocks seen in Paα outside the cloud that appear to be part of the same flow, HH 1003 A and HH 1221 (blue). A white dashed line connecting the apices of the HH 1003 A and HH 1221 bow shocks runs through the IR source J103653.8−583748 and bisects the H2 flow MHO 1639. A white box indicates the area shown in panel (b). MHO 1651, MHO 1652, and HH 1002 C are also visible in this image. (b) The bipolar jet MHO 1639 emerges from a point source, J103653.8−583748, with several knots tracing the asymmetrical flow. Knots extend ∼7 arcsec to the left of the source, approaching the edge of the cloud. The opposite outflow limb extends nearly the full length of this portion of the cloud, with knots seen ∼25 arcsec, or >0.25 pc, from the driving source. A black dashed box indicates the zoom area shown in panels (c)–(e). Bottom: images of the structured nebulosity around J103653.8−583748 shown in panel (c) F200W–F335M, panel (d) F200W, and panel (e) F187N.
