Support for a unified model of radio galaxies and quasars from isotropic forbidden O II emission

Details Support for a unified model of radio galaxies and quasars from isotropic forbidden O II emission Support for a unified model of radio galaxies and quasars from isotropic forbidden O II emission

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.362..326h&link_type=abstract

Nature (ISSN 0028-0836), vol. 362, no. 6418, p. 326-328.

Other

84

Astronomical Models, Galactic Radiation, Oxygen Spectra, Quasars, Radio Galaxies, Emission Spectra, Isotropic Media, Line Spectra

Scientific paper

The spatially integrated forbidden O II 3727 A emission-line luminosities have been measured for a number of quasars and radio galaxies taken from the 3C catalog. No systematic difference is found in the forbidden O II luminosities. It is argued that this emission is isotropic and that the results are consistent with the hypothesis that radio-loud quasars and powerful radio galaxies are intrinsically similar objects observed from different angles. The forbidden O III line, on the other hand, may still have a significantly component from the nuclear region and thus be subject to pronounced anisotropic obscuration.

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