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We present modelling of ~0.1arcsec resolution Atacama LargeMillimetre/sub-millimeter Array imaging of seven strong gravitationally lensedgalaxies detected by the Herschel Space Observatory. Four of these systems aregalaxy-galaxy scale strong lenses, with the remaining three being group-scalelenses. Through careful modelling of visibilities, we infer the mass profilesof the lensing galaxies and by determining the magnification factors, weinvestigate the intrinsic properties and morphologies of the lensedsub-millimetre sources. We find that these sub-millimetre sources all haveratios of star formation rate to dust mass that is consistent with or in excessof the mean ratio for high-redshift sub-millimetre galaxies and low redshiftultra-luminous infrared galaxies. The contribution to the infrared luminosityfrom possible AGN is not quantified and so could be biasing our star formationrates to higher values. The majority of our lens models have mass densityslopes close to isothermal, but some systems show significant differences.

Modelling high-resolution ALMA observations of strongly lensed dustystar forming galaxies detected by Herschel