ALMA Reveals an Inhomogeneous Compact Rotating Dense Molecular Torus at the NGC 1068 Nucleus

Abstract

We present the results of our ALMA Cycle 4 high-spatial-resolution (0.04-0.07") observations, at HCN J=3-2 and HCO+ J=3-2 lines, of the nucleus of NGC 1068, the nearby prototypical type 2 active galactic nucleus (AGN). Our previous ALMA observations identified the compact emission of these lines at the putative location of the torus around a mass-accreting supermassive black hole. We now report that we have detected the rotation of this compact emission, with the eastern and western sides being redshifted and blueshifted, respectively. Unlike the previously reported CO J=6-5 emission, both the morphological and dynamical alignments of the HCN J=3-2 and HCO+ J=3-2 emission are roughly aligned along the east-west direction (i.e., the expected torus direction), suggesting that these molecular lines are better probes of a rotating dense molecular gas component in the torus. The western part of the torus exhibits larger velocity dispersion and stronger emission in the HCN J=3-2 and HCO+ J=3-2 lines than the eastern part, revealing a highly inhomogeneous molecular torus. The dense molecular gas in the torus and that of the host galaxy at 0.5-2.0" from the AGN along the torus direction are found to be counter-rotating, suggesting an external process happened in the past at the NGC 1068 nucleus.

7 pages, 3 figures, accepted for publication in ApJL. Figures 1 and 2 are degraded. High resolution version is available at http://www2.nao.ac.jp/~masaimanishi/N1068/N1068bMemuH.pdf

References in corpus (9)

• A multi-transition HCN and HCO+ study of 12 nearby active galaxies: AGN versus SB environments
• Three-dimensional radiative transfer models of clumpy tori in Seyfert galaxies
• Resolving the obscuring torus in NGC 1068 with the power of infrared interferometry: Revealing the inner funnel of dust
• Dusty winds in active galactic nuclei: reconciling observations with models
• Kinematics of the Narrow-Line Region in the Seyfert 2 Galaxy NGC 1068: Dynamical Effects of the Radio Jet
• High-Velocity Bipolar Molecular Emission from an AGN Torus
• Multi-phase Nature of a Radiation-Driven Fountain with Nuclear Starburst in a Low-mass Active Galactic Nucleus
• Geometrically thick obscuration by radiation-driven outflow from magnetized tori of active galactic nuclei
• Morphological evidence for a past minor merger in the Seyfert galaxy NGC 1068

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