Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...278..499a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 278, March 15, 1984, p. 499-520.
Astronomy and Astrophysics
Astrophysics
181
Astronomical Spectroscopy, Optical Polarization, Polarimetry, Quasars, Radio Galaxies, Seyfert Galaxies, Emission Spectra, Variability
Scientific paper
This project is a search for relationships between radio and optical properties of radio galaxies. A set of 6 cm radio maps was made with the VLA, and many flux and polarization spectra were taken with the Lick 3 m telescope. The paper presents the spectropolarimetry and its relation to the radio structures. Quiescent quasar optical polarizations are all or nearly all aligned with the associated radio structure axes, Seyfert 1 polarizations tend to align with the radio sources, and Seyfert 2 polarizations are perpendicular to the radio axes. Among radio galaxies there is a significant excess of parallel objects. Among those which are not aligned, several show a perpendicular relationship. As examples of the latter case, extensive data for 3C 234 and 3C 382 are discussed and possible polarization mechanisms are modeled.
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