The miniJPAS survey: Identification and characterization of galaxy
  populations with the J-PAS photometric system
  J-PAS will soon start imaging 8000 deg2 of the northern sky with its unique
set of 56 filters (R $\sim$ 60). Before, we observed 1 deg2 on the AEGIS field
with an interim camera with all the J-PAS filters. With this data (miniJPAS),
we aim at proving the scientific potential of J-PAS to identify and
characterize the galaxy populations with the goal of performing galaxy
evolution studies across cosmic time. Several SED-fitting codes are used to
constrain the stellar population properties of a complete flux-limited sample
(rSDSS <= 22.5 AB) of miniJPAS galaxies that extends up to z = 1. We find
consistent results on the galaxy properties derived from the different codes,
independently of the galaxy spectral-type or redshift. For galaxies with
SNR>=10, we estimate that the J-PAS photometric system allows to derive stellar
population properties with a precision that is equivalent to that obtained with
spectroscopic surveys of similar SNR. By using the dust-corrected (u-r)
colour-mass diagram, a powerful proxy to characterize galaxy populations, we
find that the fraction of red and blue galaxies evolves with cosmic time, with
red galaxies being $\sim$ 38% and $\sim$ 18% of the whole population at z = 0.1
and z = 0.5, respectively. At all redshifts, the more massive galaxies belong
to the red sequence and these galaxies are typically older and more metal rich
than their counterparts in the blue cloud. Our results confirm that with J-PAS
data we will be able to analyze large samples of galaxies up to z $\sim$ 1,
with galaxy stellar masses above of log(M$_*$/M$_{\odot}$) $\sim$ 8.9, 9.5, and
9.9 at z = 0.3, 0.5, and 0.7, respectively. The SFH of a complete sub-sample of
galaxies selected at z $\sim$ 0.1 with log(M$_*$/M$_{\odot}$) > 8.3 constrain
the cosmic evolution of the star formation rate density up to z $\sim$ 3 in
good agreement with results from cosmological surveys.
