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The Unification of Quasars and Radio Galaxies

Published online by Cambridge University Press:  25 May 2016

Sperello Di Serego Alighieri
Sperello Di Serego Alighieri*
Affiliation:
Osservatorio Astrofisico di Arcetri Largo E. Fermi, 5 – 50125 Firenze – Italy

Extract

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The evidence for misdirected quasars in the nuclei of powerful radio galaxies (PRG) is now solid: 1. strong perpendicular polarization of the UV continuum, produced by the scattering of light from the hidden nucleus, has been observed in 10 (out of 11) PRG with z > 0.7 (Cimatti et al. 1993); 2. polarized broad MgII2800 has been seen in 6 PRG (di Serego Alighieri et al. 1994, Antonucci et al. 1994), showing that the hidden nucleus is indeed a quasar. These findings are receiving authoritative confirmation from observations with the Keck telescope (Cimatti, Cohen and van Breugel in these Proceedings). Here I would like to concentrate on recent developments of our understanding of the unification between quasars and PRG.

Type
Unification Issues
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 389 - 390
Copyright
Copyright © Kluwer 1996 

References

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