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1999AJ....118.1963C - Astron. J., 118, 1963-1987 (1999/November-0)
Polarimetry and unification of low-redshift radio galaxies.
COHEN M.H., OGLE P.M., TRAN H.D., GOODRICH R.W. and MILLER J.S.
Abstract (from CDS):
The BLRGs in our sample range from 3C 382, which has a quasar-like spectrum, to the highly reddened IRAS source FSC 2217+259. This reddening sequence suggests a continuous transition from unobscured quasar to reddened BLRG to NLRG. Apparently the obscuring torus does not have a distinct edge. The BLRGs have polarization images that are consistent with a point source broadened by seeing and diluted by starlight. We do not detect extended nebular or scattered emission, perhaps because it is swamped by the nuclear source. Our starlight-corrected BLRG spectra can be explained with a two-component model: a quasar viewed through dust and quasar light scattered by dust. The direct flux is more reddened than the scattered flux, causing the polarization to rise steeply to the blue. Strong rotations of the electric vector position angle across Hα in 3C 227 and 3C 445 may be explained by systematic orbital motions in an equatorial broad-line region.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Active - Galaxies: Nuclei - Polarization - Galaxies: Quasars: General
Simbad objects: 26
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