We map the kinematics of the inner (200 pc) narrow-line region (NLR) of the Seyfert 2 galaxy NGC 1068 using the instrument NIFS and adaptative optics at the Gemini North Telescope. Channel maps and position-velocity diagrams are presented at a spatial resolution of $\sim$ 10 pc and spectral resolution $\sim$ 5300 in the emission lines [Fe II] { \lambda} 1.644 { \mu}m, H$_2$ { \lambda} 2.122 { \mu}m and Br{ \gamma}. The [Fe II] emission line provides a better coverage of the NLR outflow than the previously used [O III] { \lambda} 5007 emission line, extending beyond the area of the bi-polar cone observed in Br{ \gamma} and [O III]. This is mainly due to the contribution of the redshifted channels to the NE of the nucleus, supporting its origin in a partial ionized zone with additional contribution from shocks of the outflowing gas with the galactic disc. We modeled the kinematics and geometry of the [Fe II] emitting gas finding good agreement with the data for outflow models with conical and lemniscate (or hourglass) geometry. We calculate a mass outflow rate $1.9^{ +1.9}_{ -0.7}$ M$_{ \odot}~$yr$^{ -1}$ but a power for the outflow of only 0.08% L$_{ Bol}$. The molecular (H$_2$) gas kinematics is completely distinct from that of [Fe II] and Br{ \gamma}, showing radial expansion in an off-centered $\sim$ 100 pc radius ring in the galaxy plane. The expansion velocity decelerates from $\sim$ 200 km/s in the inner border of the ring to approximately zero at the outer border where our previous studies found a 10 Myr stellar population.
Categories: astro-ph.GA