The VIMOS Public Extragalactic Redshift Survey (VIPERS). The coevolution
  of galaxy morphology and colour to z~1
  We explore the evolution of the statistical distribution of galaxy
morphological properties and colours over the redshift range $0.5<z<1$,
combining high-quality imaging data from the CFHT Legacy Survey with the large
number of redshifts and extended photometry from the VIPERS survey. Galaxy
structural parameters are measured by fitting S\'ersic profiles to $i$-band
images and then combined with absolute magnitudes, colours and redshifts, to
trace the evolution in a multi-parameter space. We analyse, using a new method,
the combination of colours and structural parameters of early- and late-type
galaxies in luminosity--redshift space. We found that both the rest-frame
colour distributions in the (U-B) vs. (B-V) plane and the S\'ersic index
distributions are well fitted by a sum of two Gaussians, with a remarkable
consistency of red-spheroidal and blue-disky galaxy populations, over the
explored redshift ($0.5<z<1$) and luminosity ($-1.5<B-B_*<1.0$) ranges. The
combination of the UBV rest-frame colour and S\'ersic index $n$ as a function
of redshift and luminosity allows us to present the structure of early- and
late-type galaxies and their evolution. We found that early type galaxies
display only a slow change of their concentrations since $z\sim1$; it is
already established by $z\sim1$ and depends much more strongly on their
luminosities. In contrast, late-type galaxies get clearly more concentrated
with cosmic time since $z\sim1$, with only little evolution in colour, which
remains dependent mainly on their luminosity. This flipped luminosity (mass)
and redshift dependence likely reflects different evolutionary tracks of early-
and late-type galaxies before and after $z\sim1$. The combination of rest-frame
colours and S\'ersic index $n$ as a function of redshift and luminosity leads
to a precise statistical description of the structure of galaxies and their
evolution.
