The wide bandwidth of the SMA allows us to image faint dusty galaxies at high-z universe. The figure shows that the two bright submillimeter sources are resolved by the SMA into five different submillimeter galaxies (small circles in the figures) at high redshifts. This is the first time single-dish submillimeter sources are resolved by an interferometer. This indicates either some unusual clustering properties of submillimeter galaxies, or a larger number of faint submillimeter galaxies than previously thought. (Wang et al. 2011, ApJ, 726, L18) |