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We present a detailed analysis of multi-wavelength HST/WFC3 imaging andKeck/OSIRIS near-IR AO-assisted integral field spectroscopy for a highlymagnified lensed galaxy at z=1.70. This young starburst is representative ofUV-selected star-forming galaxies (SFG) at z~2 and contains multiple individualstar-forming regions. Due to the lensing magnification, we can resolve spatialscales down to 100pc in the source plane of the galaxy. The velocity fieldshows disturbed kinematics suggestive of an ongoing interaction, and there is aclear signature of a tidal tail. We constrain the age, reddening, SFR andstellar mass of the star-forming clumps from SED modelling of the WFC3photometry and measure their H-alpha luminosity, metallicity and outflowproperties from the OSIRIS data. With strong star formation driven outflows infour clumps, RCSGA0327 is the first high redshift SFG at stellar mass <10^10M_sun with spatially resolved stellar winds. We compare the H-alphaluminosities, sizes and dispersions of the star-forming regions to other high-zclumps as well as local giant HII regions and find no evidence for increasedclump star formation surface densities in interacting systems, unlike in thelocal Universe. Spatially resolved SED modelling unveils an established stellarpopulation at the location of the largest clump and a second mass concentrationnear the edge of the system which is not detected in H-alpha emission. Thissuggests a picture of an equal-mass mixed major merger, which has not triggereda new burst of star formation or caused a tidal tail in the gas-poor component.

A Magnified View of the Kinematics and Morphology of RCSGA 032727-132609: Zooming in on a Merger at z=1.7