Modelling high-resolution ALMA observations of strongly lensed dustystar
  forming galaxies detected by Herschel
  We present modelling of ~0.1arcsec resolution Atacama Large
Millimetre/sub-millimeter Array imaging of seven strong gravitationally lensed
galaxies detected by the Herschel Space Observatory. Four of these systems are
galaxy-galaxy scale strong lenses, with the remaining three being group-scale
lenses. Through careful modelling of visibilities, we infer the mass profiles
of the lensing galaxies and by determining the magnification factors, we
investigate the intrinsic properties and morphologies of the lensed
sub-millimetre sources. We find that these sub-millimetre sources all have
ratios of star formation rate to dust mass that is consistent with or in excess
of the mean ratio for high-redshift sub-millimetre galaxies and low redshift
ultra-luminous infrared galaxies. The contribution to the infrared luminosity
from possible AGN is not quantified and so could be biasing our star formation
rates to higher values. The majority of our lens models have mass density
slopes close to isothermal, but some systems show significant differences.
