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A Comparison of the Centimetre-to-Submillimetre Continuum Spectra of BL Lacertae Objects and Flat Spectrum Radio Quasars

Published online by Cambridge University Press:  19 July 2016

J.A. Stevens ,
S.J. Litchfield ,
E.I. Robson ,
W. K. Gear  and
D.H. Hughes
J.A. Stevens
Affiliation:
Centre for Astrophysics, University of Central Lancashire, Preston PR1 2HE, UK
S.J. Litchfield
Affiliation:
Centre for Astrophysics, University of Central Lancashire, Preston PR1 2HE, UK
E.I. Robson
Affiliation:
Joint Astronomy Centre, 660 N. A'ohōkū Place, University Park, Hilo, Hawaii 96720, USA
W. K. Gear
Affiliation:
Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
D.H. Hughes
Affiliation:
Department of Physics, Nuclear Physics Laboratory, Keble Road, Oxford OX1 3RH, UK

Abstract

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A comparison of the centimetre to submillimetre continuum spectra of 22 BL Lacertae objects and 24 flat-spectrum radio quasars (FSRQ) has been conducted in order to search for systematic differences between the two classes. The same overall spectral shape is found for all sources and it is concluded that the same basic physical model applies to the continuum emission over this frequency range in both cases. There is clear evidence, however, for the BL Lacs to have flatter high frequency spectra and this difference is reconciled with an intrinsic difference in the underlying jets of the two classes.

Type
Poster contributions: Statistical Studies and Evolution
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 523
Copyright
Copyright © Kluwer 1994 

References

Gear, W. K. et al. 1993, Monthly Notices of the RAS, in press Google Scholar