High resolution study of the multiphase gas in Local Seyfert Galaxies
Maria Vittoria Zanchettin (SISSA)
Tuesday 04/04/2023 @ 14:00, Sala IV piano Battiferro
I will discuss the physics of the multiphase gas in local active galaxies and the impact of the Active Galactic Nucleus (AGN) on the host galaxy evolution. AGNs can generate winds and jets that interact with the host galaxy interstellar medium (ISM), potentially altering both the star formation and the nuclear gas accretion. In this talk I will focus on the warm ionized and cold molecular phases of the ISM, using MUSE/VLT and ALMA, and on the radio properties using VLA data. Thanks to these data we can probe the kinematics and interaction of the different gas phases, over a broad range of physical scales. I will present a detailed dynamical modeling of the gas component through which we can reconstruct the distribution and kinematics of the multiphase discs, winds and their interaction, from nuclear out to several kp-scale. By exploiting spatially resolved MUSE multi-line diagnostics, we are able to derive the best estimate of the velocity field, the spatial distribution, and electron density and therefore properly quantify the ionized mass across the disc, narrow line region (NLR) and outflow, and the ionized outflow energetics. I will present the application of our approach to the IBISCO sample, a sample of 57 local AGN hard X-ray selected in order to not be biased against nuclear absorption. This sample was built with the aim of studying the kinematics structures of the multiphase material including nuclear and galactic inflows or outflows motions, thus probing the feeding and feedback cycle in these objects. In addition I will focus on two peculiar cases: the nearby Seyferts Mrk509 and NGC2992. For these objects a detailed multi-wavelength analysis of the kinematics structures revealed the presence of multiphase winds extended from nuclear out to galactic scales.