Figure 8

Figure 8

An HST image of the edge-on low mass star associated with the HH30 jet. The opaque circumstellar disk surrounding HH30 appears in shadow against the bright, disk-like scattered-light region (the remnant infalling envelope) seen above and below the disk. Emerging from HH30 is a highly-collimated, ionized jet, believed to be driven by processes related to accretion of material through a magnetized disk. Gemini would have four times the spatial resolution (at 2 microns) as this I-band image, and would enable large samples of objects - many younger and more deeply embedded - to be analyzed. Critical to the success of these observations is coronagraphic and polarimetric capability; most objects lack the favorable geometry of HH30, in which the central object is obscured by a nearly edge-on disk.