Physics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.304..609m&link_type=abstract
Nature (ISSN 0028-0836), vol. 304, Aug. 18, 1983, p. 609-611. Research supported by the Science and Engineering Research Council
Physics
20
Galactic Nuclei, Nonthermal Radiation, Optical Polarization, Seyfert Galaxies, Balmer Series, Emission Spectra, Line Spectra, Linear Polarization, Near Infrared Radiation, Polarimetry
Scientific paper
Observations of NGC1068, one of the brightest Seyfert galaxies, using two high-resolution optical spectropolarimeters are reported which shed new light on the sources of the excess flux seen in the UV and IR, their connection with the collimated jets apparent in high-resolution radio maps, their association with the extended region responsible for the broad emission lines, and the location of dust and its role in modifying the optical and UV spectrum. From the detailed structure found in the linear polarization spectrum of the nucleus, it is concluded that dilution by starlight modifies the polarization to an extent not previously appreciated. The polarization of the nonstellar flux in the optical and near IR is approximately independent of wavelength (as expected for synchrotron emission or electron scattering) with a direction orthogonal to that of the radio jets. This arrangement is reminiscent of certain quasars and radio galaxies.
Aspin Colin
Heathcote Steve R.
McCaughrean Mark J.
McLean Ian S.
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