We have detected in ALMA observations CO J = 6 → 5 emission from the nucleus of the Seyfert galaxy NGC 1068. The low-velocity (up to ±70 km s−1 relative to systemic) CO emission resolves into a 12 × 7 pc structure, roughly aligned with the nuclear radio source. Higher-velocity emission (up to ±400 km s−1) is consistent with a bipolar outflow in a direction nearly perpendicular (≃80°) to the nuclear disk. The position–velocity diagram shows that in addition to the outflow, the velocity field may also contain rotation about the disk axis. These observations provide compelling evidence in support of the disk-wind scenario for the active galactic nucleus obscuring torus.
Digital Object Identifier (DOI)
R.N. acknowledges support by FONDECYT grant No. 3140436. R.M. acknowledges support from the UK Science and Technology Facilities Council (STFC).
This Letter makes use of the following ALMA data: ADS/JAO.ALMA#2013.1.00014.S.
This research made use of Astropy, a community-developed core Python package for Astronomy (see reference Astropy Collaboration et al. 2013).
Gallimore, Jack F.; Elitzur, Moshe; Maiolino, Robert; Marconi, Alessandro; O'Dea, Christopher P.; Lutz, Dieter; Baum, Stefi A.; Nikutta, Robert; Impellizzeri, C. M. V.; Davies, Richard; Kimball, Amy E.; and Sani, Eleonora, "High-Velocity Bipolar Molecular Emission from an AGN Torus" (2016). Physics and Astronomy Faculty Publications. 416.