Published in Physica Scripta, Vol. 17, 265-274, 1978.

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EXTENDED AND COMPACT EXTRAGALACTIC INTERPRETATION AND THEORY

Roger D. Blandford 1 and Martin J. Rees2


1 California Institute of Technology, Pasadena, California, U.S.A.
and 2 Institute of Astronomy, Cambridge, England


Abstract. The interpretation of strong double radio sources in terms of the "beam" model is reviewed. Implications of this model for source evolution and the nature of radio trails are briefly discussed. A final section is concerned with deductions about the properties of compact and variable components in quasars and galactic nuclei.


Table of Contents

INTRODUCTION

EXTENDED SOURCES: THEORETICAL INTERPRETATION
General observational constraints on models
Outline of the "beam "model
Interactions with the extragalactic medium
"Jets"
Radio trails
Collimation

COMPACT RADIO COMPONENTS
Angular size constraints
Radiative transfer
Kinematics of superluminal expansion
Dynamical considerations
Some observational tests

REFERENCES

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