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Composite Optical Spectra of Radio Quasars

Published online by Cambridge University Press:  25 May 2016

Joanne C. Baker  and
Richard W. Hunstead
Joanne C. Baker
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Rd, Cambridge CB3 0HE, UK Department of Astrophysics, School of Physics, University of Sydney, NSW 2006, Australia
Richard W. Hunstead
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Rd, Cambridge CB3 0HE, UK Department of Astrophysics, School of Physics, University of Sydney, NSW 2006, Australia

Extract

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Primarily to illustrate the effects of orientation on the optical properties of radio-loud quasars, we have created a set of composite optical spectra (see also Baker & Hunstead 1995). Optical spectra drawn from the 408-MHz Molonglo Quasar Sample (MQS) have been coadded in four sets according to R, the ratio of radio core-to-lobe flux, which is used as an orientation indicator (eg. Orr & Browne 1982). Compact steep-spectrum (CSS) quasars (see review by Fanti, this volume) have been combined separately, revealing for the first time many distinguishing features in their average spectra.

Type
Unification Issues
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 405 - 406
Copyright
Copyright © Kluwer 1996 

References

1. Antonucci, R.R.J. (1993), ARAA , 31, 473 Google Scholar
2. Baker, J.C. and Hunstead, R.W. (1995), ApJL , 452, L95 Google Scholar
3. Orr, M. and Browne, I.W.A. (1982), MNRAS , 200, 1067 CrossRefGoogle Scholar