THERMAL INFRARED IMAGING OF GGD27-IRS - THE ACTIVE PRE-MAIN-SEQUENCE STAR REVEALED

We present near-IR (NIR) 2.2-4.7 mu m imaging of the core region of th e pre-main sequence bipolar CO outflow source GGD27-IRS. Indirect evid ence from earlier imaging polarimetry and long-slit spectroscopy sugge sted that the true young active star in the region, GGD27-ILL, is heav ily embedded and completely obscured even at 2 mu m. Our new 4.7 mu m images directly detect this source for the first time locating it at 2 .0'' west, 1.3'' south of the bright NIR source IRS2. This position is 0.2'' from the position derived from our earlier NIR polarization map s. New mid-IR images of the core region show three pointlike sources w hich are identified as GGD27-ILL, IRS7 and IRS8. We discuss the morpho logical composition of the core region in light of our discovery.