Near-IR spectropolarimetry and modelling of NGC 1068

Details Near-IR spectropolarimetry and modelling of NGC 1068 Near-IR spectropolarimetry and modelling of NGC 1068

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.272..513y&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 272, Issue 3, pp. 513-527.

Astronomy and Astrophysics

Astronomy

54

Polarization-Scattering-Dust, Extinction-Galaxies, Active-Galaxies, Individual, Ngc 1068.

Scientific paper

We present new spectropolarimetric data for NGC 1068, including, for the first time, coverage in the near-IR. Using these, and other previously published data, we develop a scattering model for NGC 1068, using NGC 5548 for the underlying Seyfert 1 continuum spectrum and M31 for the stellar contribution. Although electron scattering is the dominant process, if NGC 5548 is typical of Seyfert 1s in the near-IR then electron scattering alone cannot be soley responsible for the observed polarization of NGC 1068 at these wavelengths, and a contribution from dichroic absorption of the radiation from the IR-emitting regions of the active nucleus, through the postulated torus, is required. The extinction in this region is A_V>=45 mag, although we note that the extinction to broad-line region and nucleus is much higher.

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