Dichotomy between Gamma-Ray Detected and Non-Detected Blazars
A special issue of Galaxies (ISSN 2075-4434).
Deadline for manuscript submissions: closed (1 February 2020) | Viewed by 189
Special Issue Editor
Interests: Her research interests include high-energy astrophysical processes - understanding the physical conditions and processes that give rise to the formation of relativistic jets in AGN, accelerate particles to GeV/TeV energies, and responsible for the emission of gamma-rays.
Special Issue Information
Dear Colleagues,
A major discovery by space- and ground-based gamma-ray telescopes is the discovery of high-energy emission from several thousands of blazars—active galaxies having their relativistic jets pointed closer to our line of sight. However, a sizable population of known blazars are still missing their gamma-ray counterpart, which leads to an unexplored dichotomy of gamma-ray detected (or gamma-ray loud) and gamma-ray non-detected (or gamma-ray quiet) blazars. Interestingly, gamma-ray detected and gamma-ray non-detected blazars have similar redshift distribution and are similar in their radio, optical, and X-ray flux distributions, with gamma-ray detected sources being slightly brighter on average in all bands. However, radio and optical polarization studies for a smaller sample of sources provide some hints in favor of the two sub-classes of objects being intrinsically different. This leads to an unexplored dichotomy of gamma-ray detected and non-detected blazars, which might provide some interesting clues about the favorable environments for the acceleration of relativistic particles to GeV/TeV energies and shed more light on the high-energy emission processes in relativistic jets.
Dr. Bindu Rani
Guest Editor
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