Universität zu Köln

Garcia-Burillo, S., Combes, F., Ramos Almeida, C., Usero, A., Krips, M., Alonso-Herrero, A., Aalto, S., Casasola, V., Hunt, L. K., Martin, S., Viti, S., Colina, L., Costagliola, F., Eckart, A., Fuente, A., Henkel, C., Marquez, I., Neri, R., Schinnerer, E., Tacconi, L. J. and van der Werf, P. P. (2016). ALMA RESOLVES THE TORUS OF NGC 1068: CONTINUUM AND MOLECULAR LINE EMISSION. Astrophys. J. Lett., 823 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 2041-8213

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Abstract

We used the Atacama Large Millimeter Array (ALMA) to map the emission of the CO(6-5) molecular line and the 432 mu m continuum emission from the 300 pc sized circumnuclear disk (CND) of the nearby Seyfert 2 galaxy NGC 1068 with a spatial resolution of similar to 4 pc. These observations spatially resolve the CND and, for the first time, image the dust emission, the molecular gas distribution, and the kinematics from a 7-10 pc diameter disk that represents the submillimeter counterpart of the putative torus of NGC 1068. We fitted the nuclear spectral energy distribution of the torus using ALMA and near-and mid-infrared (NIR/MIR) data with CLUMPY torus models. The mass and radius of the best-fit solution for the torus are both consistent with the values derived from the ALMA data alone: M-gas(torus) = (1 +/- 0.3) x 10(5) M-circle dot and R-torus = 3.5 +/- 0.5 pc. The dynamics of the molecular gas in the torus show strong non-circular motions and enhanced turbulence superposed on a surprisingly slow rotation pattern of the disk. By contrast with the nearly edge-on orientation of the H2O megamaser disk, we found evidence suggesting that the molecular torus is less inclined (i = 34 degrees-66 degrees) at larger radii. The lopsided morphology and complex kinematics of the torus could be the signature of the Papaloizou-Pringle instability, long predicted to likely drive the dynamical evolution of active galactic nuclei tori.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Garcia-Burillo, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Combes, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ramos Almeida, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Usero, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Krips, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Alonso-Herrero, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Aalto, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Casasola, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hunt, L. K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Martin, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Viti, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Colina, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Costagliola, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eckart, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fuente, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Henkel, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marquez, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Neri, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schinnerer, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tacconi, L. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED van der Werf, P. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-275271
DOI:	10.3847/2041-8205/823/1/L12
Journal or Publication Title:	Astrophys. J. Lett.
Volume:	823
Number:	1
Date:	2016
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	2041-8213
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SPECTRAL ENERGY-DISTRIBUTION; WATER MASER EMISSION; AGN DUSTY TORI; SPATIAL-RESOLUTION; ADAPTIVE OPTICS; GALAXY NGC-1068; RADIO STRUCTURE; ACTIVE NUCLEUS; REGION; DISK Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27527