Variability of Blazars

Front Cover
E. VALTAOJA (Ed), Mauri Valtonen
Cambridge University Press, 1992 - Science - 465 pages
0 Reviews
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 polarization, 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.
 

What people are saying - Write a review

We haven't found any reviews in the usual places.

Contents

Many Black Hole Nuclei in Blazars
39
Pulsation of a Supermassive Star in Tensor Field Gravitation Theory
52
Two Classes of BL Lac Objects?
70
Variability of Nonthermal Continuum Emission in Blazars
85
Variability of 3C 273 and Shock Models
102
The CmWavelength Flux Behavior of AGNs
126
CentimeterWavelength Linear Polarization Observations of Active
134
Observations of Southern Blazars
151
Blazar Models
264
Polarized Synchrotron Emission from Shock Accelerated Particles
278
First Detection of Nightly Variations in the Frequency Dependent
294
Accretion Disk Models for Microvariability
311
On the Possible Cause of Rapid Flux Variability in Active
327
Rapid Variability in the BL Lac Object S5 0716+714
346
Detection of Microvariability in Mrk 421
361
Periodicity in OJ 287?
378

A Study of Long Term Variability of Blazars in Multifrequency Spectral
167
Northern Hemisphere Survey of Quasar Variability
184
Structural Variability of Active Galactic Nuclei at 43 GHz
205
Apparent
221
What Is Responsible for the New Outburst of 0735+178
234
Radio Structures of Selected Blazars at Subarcsec Resolutions
251
3cm Variability of Blazars
391
The Energetics and Morphologies of Blazar Outbursts
414
Optical Spectral Energy Distributions of Variable Sources in Blazars
427
an Interpretation
438
Index of Objects
459
Copyright

Common terms and phrases

About the author (1992)

Mauri Valtonen is a Professor of Astronomy at the University of Turku.

Bibliographic information