Invited talk at "Gamma2016", Heidelberg July 11-15, 2016, to be published in a special volume of the AIP Conference Proceedings.
https://arxiv.org/abs/1609.04260

For a PDF version of the article, click here.

GAMMA RAYS FROM BLAZARS

Fabrizio Tavecchio


INAF-Osservatorio Astronomico di Brera, Via Bianchi 46, 23807 Merate, (LC), Italy


Abstract: Blazars are high-energy engines providing us natural laboratories to study particle acceleration, relativistic plasma processes, magnetic field dynamics, black hole physics. Key informations are provided by observations at high-energy (in particular by Fermi/LAT) and very-high energy (by Cherenkov telescopes). I give a short account of the current status of the field, with particular emphasis on the theoretical challenges connected to the observed ultra-fast variability events and to the emission of flat spectrum radio quasars in the very high energy band.


Table of Contents

INTRODUCTION
The General Framework and its Epicycles

SOME OPEN ISSUES
Ultra-fast variability: sparks from magnetic reconnection?
Flat spectrum radio quasars at VHE

OUTLOOK: TOWARD THE CTA ERA

REFERENCES

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