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Blazars: Clues to Jet Physics

Published online by Cambridge University Press:  25 May 2016

Rita M. Sambruna
Rita M. Sambruna*
Affiliation:
Pennsylvania State University, 525 Davey Lab, University Park, PA 16802

Abstract

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Being dominated by non-thermal emission from aligned relativistic jets, blazars allow us to elucidate the physics of extragalactic jets, and, ultimately, how energy is extracted from the central black hole. Crucial information about jet structure is provided by the spectral energy distributions from radio to γ-rays, their trends with luminosity, and correlated multifrequency variability. Since blazar jets have broad implications for all radio-loud (and possibly radio-quiet) AGNs, we also need to understand their circumnuclear structure, especially the details of the physical and dynamical conditions of the highly ionized gas on sub-pc scales, which could be directly related to jet formation and radiative power. Eventually, the bulk of information provided by blazars will help us clarify the origin of the radio-loud/radio-quiet AGN dichotomy, one of the most outstanding open issues of extragalactic astrophysics.

Type
II. Observational Properties of AGN and Related Objects
Information
Symposium - International Astronomical Union , Volume 194: Activity in Galaxies and Related Phenomena , 1999 , pp. 113 - 122
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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