Radio Galaxies at VHE Energies

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...

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Bibliographic Details
Published inGalaxies Vol. 6; no. 4; p. 116
Main Authors Rieger, Frank, Levinson, Amir
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 15.11.2018
Subjects
Active galactic nuclei
Black holes
emission: non-thermal
Galaxies
Gamma ray spectra
Gamma rays
origin: black hole
origin: jet
Physics
Radio galaxies
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Summary: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.
ISSN:2075-4434
2075-4434
DOI:10.3390/galaxies6040116