  We present the results of an adaptive optics (AO) imaging survey of the
common associations of Tucana and Horologium, carried out at the ESO 3.6m
telescope with the ADONIS/SHARPII system. Based on our observations of two
dozen probable association members, HIP 1910 and HIP 108422 appear to have
low-mass stellar companions, while HIP 6856 and GSC 8047-0232 have possible
sub-stellar candidate companions. Astrometric measurements, performed in
November 2000 and October 2001, indicate that HIP 1910 B likely is bound to its
primary, but are inconclusive in the case of the candidate companion to HIP
6856. Additional observations are needed to confirm the HIP 6856 companionship
as well as for HIP 108422 and GSC 8047-0232.
