2019MNRAS.489.5653D

We map the optical and near-infrared (NIR) emission-line flux distributions and kinematics of the inner 320 x 535 pc² of the elliptical galaxy NGC 1052. The integral field spectra were obtained with the Gemini Telescope using the GMOS-IFU and NIFS instruments, with angular resolutions of 0.88 and 0.1 arcsec in the optical and NIR, respectively. We detect five kinematic components: (1) and (2) two spatially unresolved components: a broad-line region visible in H α, with a full width at half-maximum (FWHM) of ∼3200 km s^–1, and an intermediate broad component seen in the [O III] λλ4959,5007 doublet; (3) an extended intermediate-width component with 280 km s^–1 < FWHM < 450 km s^–1 and centroid velocities up to 400 km s^–1, which dominates the flux in our data, attributed either to a bipolar outflow related to the jets, rotation in an eccentric disc or to a combination of a disc and large-scale gas bubbles; (4) and (5) two narrow (FWHM < 150 km s^–1) components, one visible in [O III], and another visible in the other emission lines, extending beyond the field of view of our data, which is attributed to large-scale shocks. Our results suggest that the ionization within the observed field of view cannot be explained by a single mechanism, with photoionization being the dominant mechanism in the nucleus with a combination of shocks and photoionization responsible for the extended ionization.