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Optical Spectra and Radio Properties of Quasars

Published online by Cambridge University Press:  14 August 2015

Beverley J. Wills
Beverley J. Wills*
Affiliation:
McDonald Observatory and Department of Astronomy, The University of Texas at Austin

Extract

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Relations between observed optical and radio properties can, in principle, constrain the geometry and physical conditions of the broad-line regions in quasars and active nuclei. Osterbrock and colleagues (see this symposium) and J.E. Steiner (preprint) have noted differences between Hα/Hβ, [0III]/Hβ and optical Fe II emission for Seyfert 1 galaxies, broad-line radio galaxies (BLRG's) and quasars. Stockman et al. (1979) discovered a tendency for optical continuum polarization angles for quasars to be aligned with the direction of the outer radio lobes. Setti and Woltjer (1977) and Miley and Miller (1979) noted that the quasars with strongest Fe II are among the most compact radio sources (e.g. 3C 48, 0736+01, 1510–08), and Miley and Miller also note that the distribution of line widths is narrower for the more compact than for extended radio sources.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 373 - 374
Copyright
Copyright © Reidel 1982 

References

Miley, G.K., and Miller, J.S.: 1979, Ap.J. (Letters), 228, L55.Google Scholar
Setti, G., and Woltjer, L.: 1977, Ap.J. (Letters), 218, L33.CrossRefGoogle Scholar
Stockman, H.S., Angel, J.R.P., and Miley, G.K.: 1979, Ap.J. (Letters), 227, L55.CrossRefGoogle Scholar