Optical polarization of the Seyfert galaxies MRK 3, MRK 231, NGC 3227 and NGC 3516

Details Optical polarization of the Seyfert galaxies MRK 3, MRK 231, NGC 3227 and NGC 3516 Optical polarization of the Seyfert galaxies MRK 3, MRK 231, NGC 3227 and NGC 3516

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.192...53t&link_type=abstract

and J. D. Landstreet. Royal Astronomical Society, Monthly Notices, vol. 192, July 1980, p. 53-74. Research supported by the Nati

Astronomy and Astrophysics

Astronomy

34

Emission Spectra, Galactic Structure, Line Spectra, Optical Polarization, Seyfert Galaxies, Circular Polarization, Continuous Spectra, Galactic Nuclei, H Alpha Line, Interstellar Extinction

Scientific paper

The paper presents intermediate resolution observations of the emission line and continuum polarization of the Seyfert galaxies Mrk 3, Mrk 231, NGC 3227, and NGC 3516. The polarization shows a strong wavelength dependence with the polarization increasing smoothly into the blue for each galaxy. This wavelength dependence, together with the presence of polarized H(alpha) emission, indicates that the polarization of each galaxy is caused by an asymmetric dust envelope surrounding the nucleus. Observations of the polarization of the /O III/ lambda 5007 emission in Mrk 3 and NGC 3227, and the polarization through the nonstellar Na ID line absorption in Mrk 231 are used to place constraints on the extent of the polarizing clouds in these galaxies. No polarization variability was detected with time-bases ranging from a few weeks to three years.

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