Abstract
We present a two-dimensional mapping of the central region of the active galaxy NGC 2110, using K-band integral field spectroscopy with the Gemini NIFS at a spatial resolution of ≈ 25 pc. We present flux distributions and kinematics for the molecular and ionized gas emission lines, as well as the stellar kinematics. The maps for the kinematics and flux distributions of the emitting gas for NGC 2110 were obtained by fitting the H_{2} λ 2.1218 μ m and H Iλ 2.1661 μ m emission-line profiles by Gauss-Hermite series. The H_{2} presents extended emission in the whole field of observation, while the Brγ is extended only to the southeast - northwest direction. The H_{2} emission is consistent with emission of gas excited by thermal processes, such as gas heated by X-rays from the AGN or shocks. We estimated an excitation temperature of ≈ 2100-2700 K for H_{2} emitting gas. The gas velocity fields present a similar rotation pattern than those observed for the stars. In addition, the H_{2} velocity field presents other kinematic components. Two spiral structures are observed in blueshifts to the north of the nucleus and redshifts to the south of it. If these kinematic structures are originated from emission of gas located in the plane of the galaxy, they can be interpreted as gas flows towards the nucleus (inflows) of the galaxy. In this case, the mass inflow rate is estimated to be ≈ 4.1 × 10^{-4} M_{odot} yr^{-1}. Another kinematic component observed for H_{2} emitting gas was interpreted as an ejection of gas from the nucleus (outflows) within a bi-cone with a mass outflow rate of ≈ 4.6 × 10^{-4} M_{odot} yr^{-1}.
