HIGH-SPATIAL-RESOLUTION SHIFT-AND-ADD IMAGING AT UKIRT - MULTIPLICITYAMONGST YOUNG STELLAR OBJECTS

We present results from near-infrared 'shift-and-add' imaging at UKIRT using the upgraded near-infrared imaging camera, IRCAM3, and new cont rol electronics, ALICE. Commissioning data on 12 sources in the Ophiuc hus dark cloud complex are described. All but one source have previous ly been studied using 2D speckle imaging. We compare the results obtai ned by the two techniques and demonstrate that 'shift-and-add' imaging with IRCAM3 can produce results comparable to those obtained by the 2 D speckle technique. We additionally discuss both the current imaging quality of UKIRT and its predicted performance after the planned therm al, dynamical and optical upgrades.