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Galaxies 2018, 6(4), 116;

Radio Galaxies at VHE Energies

ZAH, Institut für Theoretische Astrophysik, Heidelberg University, Philosophenweg 12, 69120 Heidelberg, Germany
The Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
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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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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