High spatial resolution IR observations and variability of the nuclear region of NGC 1068 - Structure and nature of the inner 100 parsec

Details High spatial resolution IR observations and variability of the nuclear region of NGC 1068 - Structure and nature of the inner 100 parsec High spatial resolution IR observations and variability of the nuclear region of NGC 1068 - Structure and nature of the inner 100 parsec

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...177...51c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 177, no. 1-2, May 1987, p. 51-62.

Astronomy and Astrophysics

Astronomy

24

Galactic Nuclei, Galactic Structure, Infrared Astronomy, Seyfert Galaxies, Astronomical Models, Electron Scattering, Image Processing, Interferometry, Nonthermal Radiation

Scientific paper

Speckle interferometric observations of the Seyfert galaxy NGC 1068 have been carried out at 3.61 μm in two perpendicular directions, at P.A. = 45° and P.A. = 135°. The optical, IR and radio data of the nucleus can be interpreted as follows: a nuclear core, with a maximum size of 0.15 pc and a maximum mass of 5×108M_sun;, illuminates an optically thick halo of scattering electrons with a diameter of 18 pc and a maximum mass of 105M_sun;, that can be identified with the barely resolved 2 cm radio nucleus. A disk of gas and dust with a scale height of 4 pc and a minimum mass of 105M_sun; prevents a direct view of the visible and UV continua arising from the unresolved nuclear core, the latter being directly seen through dust in the IR. The change in polarization from the visible to the near IR could be explained in terms of scattering by electron clouds and transmission through strongly aligned dust. The extended emission could have its origin in a shock induced starburst.

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