PCA Tomography, kinematics and gas inflow in the nucleus of the Seyfert 2 galaxy NGC 6951

Abstract

Active galactic nuclei are associated with black holes in the process of mass accretion. They can be classified in several ways (QSO, Seyfert 1 and 2, liners etc.) depending on their observational characteristics. The study of these objects can reveal not only the geometry and physical processes associated with them but also their role in the evolution of the galaxy as a whole. The object of the present study is the nucleus of the Seyfert 2 galaxy NGC 6951, type SAB(rs)bc, located at 22.8 Mpc. We aim, particularly, to detect if the gas inflow phenomenon can be detected with the lines of [S II]. We intend to carry out spectral synthesis to remove the stellar content, making PCA Tomography and apply the methodology of separation of emission of [S II] clouds of high and low densities, with velocity resolution. In addition to study the structure of the AGN itself, we believe that the gas inflow towards the central black hole can be detected from the study of the [S II] lines.(AU)