2020A&A...634A...1G

Query : 2020A&A...634A...1G

2020A&A...634A...1G - Astronomy and Astrophysics, volume 634A1-1 (2020/2-1)

An image of the dust sublimation region in the nucleus of NGC 1068.

GRAVITY COLLABORATION, PFUHL O., DAVIES R., DEXTER J., NETZER H., HONIG S., LUTZ D., SCHARTMANN M., STURM E., AMORIM A., BRANDNER W., CLENET Y., DE ZEEUW P.T., ECKART A., EISENHAUER F., FORSTER SCHREIBER N.M., GAO F., GARCIA P.J.V., GENZEL R., GILLESSEN S., GRATADOUR D., KISHIMOTO M., LACOUR S., MILLOUR F., OTT T., PAUMARD T., PERRAUT K., PERRIN G., PETERSON B.M., PETRUCCI P.O., PRIETO M.A., ROUAN D., SHANGGUAN J., SHIMIZU T., STERNBERG A., STRAUB O., STRAUBMEIER C., TACCONI L.J., TRISTRAM K.R.W., VERMOT P., WAISBERG I., WIDMANN F. and WOILLEZ J.

Abstract (from CDS):

We present near-infrared interferometric data on the Seyfert 2 galaxy NGC 1068, obtained with the GRAVITY instrument on the European Southern Observatory Very Large Telescope Interferometer. The extensive baseline coverage from 5 to 60Mλ allowed us to reconstruct a continuum image of the nucleus with an unrivaled 0.2pc resolution in the K-band. We find a thin ring-like structure of emission with a radius r=0.24±0.03pc, inclination i=70±5°, position angle PA=-50±4°, and h/r<0.14, which we associate with the dust sublimation region. The observed morphology is inconsistent with the expected signatures of a geometrically and optically thick torus. Instead, the infrared emission shows a striking resemblance to the 22GHz maser disc, which suggests they share a common region of origin. The near-infrared spectral energy distribution indicates a bolometric luminosity of (0.4-4.7)x10⁴⁵erg/s, behind a large A_K~=5.5 (A_V~=90) screen of extinction that also appears to contribute significantly to obscuring the broad line region.

Abstract Copyright: © GRAVITY Collaboration et al. 2020

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: Seyfert - techniques: interferometric

VizieR on-line data: <Available at CDS (J/A+A/634/A1): list.dat fits/*>

Simbad objects: 6

Full paper

View the references in ADS

Number of rows : 6

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	BD+17 5022	PM*	00 00 36.6218147052	+17 58 08.077493653		11.60		10.208		K4V	30	0
2	M 77	Sy2	02 42 40.7091669408	-00 00 47.859690204	9.70	9.61	8.87	10.1	9.9	~	4897	2
3	StKM 1-388	Em*	03 35 19.2086981736	+05 43 31.042545780		12.95	12.15			K5	18	0
4	BD+00 643	PM*	03 41 55.1754408696	+00 32 33.694492164				10.7		K0	21	1
5	NGC 3783	Sy1	11 39 01.7096819040	-37 44 19.009642992		12.46	13.43	11.33	12.1	~	1765	1
6	NAME Galactic Center	reg	17 45 39.60213	-29 00 22.0000						~	16269	0

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