Molecular gas dynamics around nuclei of galaxies
arXiv:2205.06106 · doi:10.1051/epjconf/202226500047
Abstract
Recent molecular line observations with ALMA in several nearby Seyferts have revealed the existence of molecular tori, and the nature of gas flows at 10-20~pc scale. At 100~pc scale, or kpc-scale, previous NOEMA work on gravitational torques had shown that only about one third of Seyfert galaxies experienced molecular inflow and central fueling, while in most cases the gas was stalled in rings. At higher resolution, i.e. 10-20~pc scale, it is possible now to see in some cases AGN fueling due to nuclear trailing spirals, influenced by the black hole potential. This brings smoking gun evidence for nuclear fueling. In our sample galaxies, the angular resolution of up to 60~mas allows us to reach the black hole (BH) sphere of influence and the BH mass can be derived more directly than with the M-sigma relation.
arXiv comment6 pages, 4 figures, invited talk at "Multi-line Diagnostics of the Interstellar Medium", Nice, April 2022, to be published in The European Physical Journal Web of Conferences
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