Annu. Rev. Astron. Astrophys. 1992. 30: 429-456
Copyright © 1992 by Annual Reviews Inc. All rights reserved

Reprinted with kind permission from Annual Reviews Inc., 4139 El Camino Way, Palo Alto, California, USA


THE ORIGIN OF THE X-RAY BACKGROUND

A.C. Fabian


Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK

X. Barcons


Departamento de Fisica Moderna, Universidad de Cantabria, 39005 Santander, Spain


Key Words: diffuse background, quasars, large-scale structure, X-ray sources


Table of Contents

INTRODUCTION

THE SPECTRUM OF THE XRB

THE ISOTROPY OF THE X-RAY BACKGROUND

THE CONTRIBUTION OF KNOWN CLASSES OF DISCRETE SOURCES
Surveys at Energies Above 3 keV
Surveys at Energies Less Than 3 keV
Constraints from the Isotropy of the X-Ray Background
Conclusion

MODELS FOR THE RESIDUAL BACKGROUND
A Diffuse Origin?
A New Class of Sources

THE LARGE-SCALE STRUCTURE OF THE UNIVERSE AND THE X-RAY BACKGROUND

SUMMARY AND FUTURE WORK

REFERENCES

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