Anisotropic [oiii] emission in radio loud agn
/ Authors
/ Abstract
We present the results of spectropolarimetry of a sample of 7 powerful radio galaxies and 2 quasars with 0:07 < z< 0 :35 obtained to detect possible anisotropies in the (OIII) line emission, which could explain the higher (OIII) luminos- ity of quasars than that of radio galaxies within the framework of the Unied Model of radio-loud AGN. We detect polarized (OIII) in 4 radio galaxies, consistent with the possibility that a considerable fraction ( 20%) of the observed (OIII) emission is scattered in a similar way to the hidden nuclear continuum. However,smallbutdetectablerotationbetweenthepolarization direction of the line and of the continuum in two radio galaxies showsthatthegeometryoftheemittingregionscanbedifferent.
Journal: Astronomy and Astrophysics