Resolved scaling relations and metallicity gradients on sub-kiloparsec
  scales at z=1
  The existence of a spatially resolved Star-Forming Main Sequence (rSFMS) and
a spatially resolved Mass-Metallicity Relation (rMZR) is now well established
for local galaxies. Moreover, gradients with metallicity decreasing with radius
seem to be common in local disc galaxies. These observations suggest that
galaxy formation is a self-regulating process, and provide constraints for
galaxy evolution models. Studying the evolution of these relations at higher
redshifts is still however very challenging. In this paper, we analyse three
gravitationally lensed galaxies at z = 0.6, 0.7 and 1, observed with MUSE and
SINFONI. These galaxies are highly magnified by galaxy clusters, which allow us
to observe resolved scaling relations and metallicity gradients on physical
scales of a couple of hundred parsecs, comparable to studies of local galaxies.
We confirm that the rSFMS is already in place at these redshifts on sub-kpc
scales, and establish, for the first time, the existence of the rMZR at higher
redshifts. We develop a forward-modelling approach to fit 2D metallicity
gradients of multiply imaged lensed galaxies in the image plane, and derive
gradients of -0.027+/-0.003, -0.019+/-0.003 and -0.039+/-0.060 dex/kpc. Despite
the fact that these are clumpy galaxies, typical of high redshift discs, the
metallicity variations in the galaxies are well described by global linear
gradients, and we do not see any difference in metallicity associated with the
star-forming clumps.
