A panchromatic spatially resolved study of the inner 500 pc of NGC 1052-II. Gas excitation and kinematics

We map the optical and near-infrared (NIR) emission-line flux distributions and kinematics of the inner 320 x 535 pc(2) 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 Ha, with a full width at half-maximum (FWHM) of similar to 3200 km s(-1), and an intermediate broad component seen in the [O III] lambda lambda 4959,5007 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.