Variability of blazars : proceedings of a Conference in honour of the 100th anniversary of the birth of Academician Yrjö Väisälä, held at Tuorla Obseratory, University of Turku, Finland, January 6-10, 1991
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Bibliographic Information
Variability of blazars : proceedings of a Conference in honour of the 100th anniversary of the birth of Academician Yrjö Väisälä, held at Tuorla Obseratory, University of Turku, Finland, January 6-10, 1991
Cambridge University Press, 1992
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Includes indices
Description and Table of Contents
Description
Blazars (also known as BL Lac objects), first discovered in 1978, are unusually energetic objects in the extragalactic universe. About 200 are known or suspected. They are radio sources with highly variable optical and radio emission, as well as high polarisation, and their optical spectra normally have no distinguishable features. It is generally accepted that they belong to that class of galaxies with active galactic nuclei, which are presumed to be driven by infall of matter to a supermassive black hole. In this book researchers give a complete summary of the observations of blazars and the theoretical interpretation. A comprehensive listing of confirmed and candidate objects is included. Mechanisms in which the variability can arise from shocks and relativistic jets are discussed. There are at least four different answers given to the question: what is a blazar? This book is a complete overview of the violent activity observed in these extreme active galactic nuclei.
Table of Contents
- Preface
- Acknowledgements
- Participants
- Opening address
- 60 review chapters and research papers
- Index of objects
- Index of subjects.
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