High spatial resolution 'shift-and-add' imaging at UKIRT: Multiplicity amongst 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 control electronics, ALICE. Commissioning data on 12 sources in the Ophiuchus dark cloud complex are described. All but one source have previously been studied using 2D speckle imaging. We compare the results obtained by the two techniques and demonstrate that 'shift-and-add' imaging with IRCAM3 can produce results comparable to those obtained by the 2D speckle technique. We additionally discuss both the current imaging quality of UKIRT and its predicted performance after the planned thermal, dynamical and optical upgrades.