The HH 49/50 Outflow Source in Chamaeleon I

Abstract

Our CO (J = 1-0 and 2-1) observations obtained at SEST 15-m radio telescope reveal a large (diameter 0.4 pc) bipolar outflow around the deeply embedded Class I point source Ced 110 IRS 4 (Prusti et al., 1991) which was referred to in our earlier paper (Mattila et al., 1989) as IRAS 11054-7706 C (Cohen and Schwartz, 1987). The contour maps of the integrated CO wing emission show a double structure in the outflow lobes (Fig. 1): the axis of the NE-SW oriented “ordinary” high-velocity outflow is pointing towards the shocked cloudlets HH 49/50, the NW-SE oriented “extraordinary” outflow (Fig. 2) is, however denser and shows a morphology that resembles a spiral (the flow tends to turn towards the direction of the high velocity outflow at greater distances from the star).