  We investigate the resolved star formation properties of a sample of 45
massive galaxies (M_*>10^11M_solar) within a redshift range of 1.5 < z < 3
detected in the GOODS NICMOS Survey (Conselice et al. 2011), a HST H-band
imaging program. We derive the star formation rate as a function of radius
using rest frame UV data from deep z_{850} ACS imaging. The star formation
present at high redshift is then extrapolated to z=0, and we examine the
stellar mass produced in individual regions within each galaxy. We also
construct new stellar mass profiles of the in-situ stellar mass at high
redshift from Sersic fits to rest-frame optical, H_{160}-band, data. We combine
the two stellar mass profiles to produce a modelled evolved stellar mass
profile. We then fit a new Sersic profile to the evolved profile, from which we
examine what effect the resulting stellar mass distribution added via star
formation has on the structure and size of each individual galaxy. We conclude
that due to the lack of sufficient size growth and Sersic evolution by star
formation other mechanisms such as merging must contribute a large proportion
to account for the observed structural evolution from z>1 to the present day.
