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Galaxies 2018, 6(4), 116; https://doi.org/10.3390/galaxies6040116

Radio Galaxies at VHE Energies

1
ZAH, Institut für Theoretische Astrophysik, Heidelberg University, Philosophenweg 12, 69120 Heidelberg, Germany
2
The Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
3
Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
*
Author to whom correspondence should be addressed.
Received: 9 October 2018 / Revised: 7 November 2018 / Accepted: 8 November 2018 / Published: 15 November 2018
(This article belongs to the Special Issue Radio Galaxies at TeV Energies)
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Abstract

Radio Galaxies have by now emerged as a new γ-ray emitting source class on the extragalactic sky. Given their remarkable observed characteristics, such as unusual gamma-ray spectra or ultrafast VHE variability, they represent unique examples to probe the nature and physics of active galactic nuclei (AGN) in general. This review provides a compact summary of their observed characteristics at very high γ-ray energies (VHE; greater than 100 GeV) along with a discussion of their possible physics implications. A particular focus is given to a concise overview of fundamental concepts concerning the origin of variable VHE emission, including recent developments in black hole gap physics. View Full-Text
Keywords: gamma-rays; radio galaxies; emission: non-thermal; origin: jet; origin: black hole gamma-rays; radio galaxies; emission: non-thermal; origin: jet; origin: black hole
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Rieger, F.M.; Levinson, A. Radio Galaxies at VHE Energies. Galaxies 2018, 6, 116.

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