Published in 1998, Astronomy and Astrophysics Review, 9, 1-32


THE BRIGHT QUASAR 3C 273

Thierry J.-L. Courvoisier


INTEGRAL Science Data Centre and Geneva Observatory
16, Ch. d'Ecogia, CH-1290 VERSOIX, Switzerland


Abstract. We review the observed properties of the bright quasar 3C 273 and discuss the implications of these observations for the emission processes and in view of gaining a more global understanding of the object.

Continuum and line emission are discussed. The emission from the radio domain to gamma rays are reviewed. Emphasis is given to variability studies across the spectrum as a means to gain some understanding on the relationships between the emission components.

3C 273 has a small scale jet and a large scale jet. The properties of these jets are described. It is also attempted to relate the activity in the small scale jet to that observed in the radio and infrared continuum.


Table of Contents

INTRODUCTION

DISCOVERY AND EARLY WORK

CONTINUUM EMISSION
Radio Emission
Millimetre and infrared emission
Variability of the millimetre-IR emission
The blue bump
The variability of the blue bump
X and gamma-ray emission
The soft excess
The medium energy component
The Fe line
The high energy component
X-ray variability
The Overall continuum spectral energy distribution

THE MULTI-WAVELENGTH APPROACH TO THE CONTINUUM EMISSION

LINE EMISSION
Line variability

THE JET
The radio-optical jet
The VLBI Jet

THE HOST GALAXY

UNDERSTANDING IT

REFERENCES

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