The kiloparsec-scale gas kinematics in two star-forming galaxies at $z
  \sim 1.47$ seen with ALMA and VLT-SINFONI
  We present Atacama Large Millimeter/submillimeter Array (ALMA) CO($J=2-1$)
observations of two main-sequence star-forming galaxies at $z\sim1.47$ taken
from the High-Z Emission Line Survey (HiZELS). These two systems have been
previously reported to be molecular gas rich $f_{\rm H_2} \equiv M_{\rm
H_2}/(M_{\rm H_2} + M_\star) \sim 0.8$. We carried out a follow-up study to
resolve, at $\sim$kpc-scales, the CO emission. These new observations are
combined with our earlier ALMA observations (sensitive to diffuse CO emission)
and compared with our previous H$\alpha$-based study at matched spatial
resolution. One target is marginally resolved in CO(2-1), showing complex
dynamics with respect to the ionised gas traced by H$\alpha$. While the other
source is spatially resolved, enabling a detailed exploration of its internal
dynamical properties. In this system, both gaseous phases show similar spatial
extension, rotation velocities and velocity dispersions ($V_{\rm rot} \sim
\sigma_v \sim 100$\,km\,s$^{-1}$) suggesting a rotational velocity to velocity
dispersion ratio consistent with unity. By comparing the ionized and molecular
gas tracers through the use of a two-dimensional kinematic model, we estimate a
median depletion time $\tau_{\rm dep}=2.3 \pm 1.2$\,Gyr for the galaxy as a
whole. This value is in agreement with the average $\tau_{\rm dep}$ value
observed in local star-forming galaxies at similar spatial scales. Using a
thick-disk dynamical modelling, we derive a dynamical mass $M_{\rm dyn} =
(1.59\pm0.19) \times 10^{11}$\,$M_\odot$ within $\approx 6$\,kpc. This suggests
a dark matter fraction ($f_{\rm DM} \equiv M_{\rm DM}/M_{\rm dyn}$) of
$0.59\pm0.10$, in agreement with the average $f_{\rm DM}$ value derived from
stacked rotation curve analysis of galaxies at similar redshift range.
