J/A+A/634/A1 NGC 1068 GRAVITY reconstructed image (GRAVITY+, 2020)
An image of the dust sublimation region in the nucleus of NGC 1068.
GRAVITY Coll., Pfuhl O., Davies R., Dexter J., Netzer H., Hoenig S., Lutz D.,
Schartmann M., Sturm E., Amorim A., Brandner W., Clenet Y., de Zeeuw P.T.,
Eckart A., Eisenhauer F., Foerster 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., Woillez J.
<Astron. Astrophys. 634, A1 (2020)>
=2020A&A...634A...1G 2020A&A...634A...1G (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Interferometry
Keywords: galaxies: active - galaxies: nuclei - galaxies: Seyfert -
techniques: interferometric
Abstract:
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
AK~=5.5 (AV~=90) screen of extinction that also appears to
contribute significantly to obscuring the broad line region.
Description:
We present new 0.2pc resolution observations from the GRAVITY
interferometer on the VLT, which spatially resolve the hot dust
continuum in the central parsec of NGC 1068.
Objects:
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RA (2000) DE Designation(s)
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02 42 40.77 -00 00 47.8 NGC 1068 = M 77
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 116 2 List of fits files
fits/* . 2 Individual fits files
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
12 A1 --- DE- Declination sign (J2000)
13- 14 I2 deg DEd Declination (J2000)
16- 17 I2 arcmin DEm Declination (J2000)
19- 22 F4.1 arcsec DEs Declination (J2000)
24- 26 I3 --- Nx Number of pixels along X-axis
28- 30 I3 --- Ny Number of pixels along Y-axis
32- 34 I3 Kibyte size Size of FITS file
36- 59 A24 --- FileName Name of FITS file, in subdirectory fits
61-116 A56 --- Title Title of the FITS file
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Acknowledgements:
Richard Davies, davies(at)mpe.mpg.de
(End) Patricia Vannier [CDS] 20-Jan-2020