Title: High-resolution imaging of a uniquely bright sample of SMGs

Abstract:
Via the uniquely wide extragalactic imaging survey, Herschel-ATLAS, we have uncovered a 
population of ultra-bright submm galaxies (SMGs) whose redshifts have been determined via 
millimetric CO emission lines. Their extreme brightness is due to gravitational amplification by 
foreground galaxies and means we can study the properties of these galaxies in exquisite 
detail. In this contribution we present the spatially-resolved dynamical, structural and excitation 
properties in 9 of those intensely star-forming galaxies at resolutions comparable to those of 
their individual giant molecular clouds. We also present the best lensing models in those 
galaxies, that allows to reconstruct their un-lensed CO images and velocity maps. A 
comparison with lens models based on dust and stellar emission is also included.