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    • AGN at very high energies: Cosmic accelerators and probes of space-time

      HÉLÈNE SOL

      Review Volume 39 Issue 4 August 2018 Article ID 0052

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/039/04/0052

    • Keywords

       

      Very high energy astrophysics; active galactic nuclei; cosmic accelerators; cosmology.

    • Abstract

       

      During the last decade, very high energy astrophysics emerged as a new branch of astronomy with major discoveries achieved by the present ground-based gamma-ray Cherenkov telescopes. The sample of cosmic sources firmly detected at very high energy (VHE) now exceeds two hundred objects, includingactive galactic nuclei (AGN), pulsar wind nebulae, and several other types of sources of which a significant number are unidentified ones. The scientific return from recent VHE data is particularly interesting for AGN science, shedding new light on particle acceleration and emission processes around supermassiveblack holes, and probing the intergalactic space by the analysis of VHE photons propagating from bright remote sources to the Earth. The perspectives of this research field are promising with new generation VHE instruments such as CTA, a project of open observatory at extreme energies at the horizon 2023,allowing a deep analysis of the sky in the highest part of the electromagnetic spectrum, from 20 GeV to 300 TeV.

    • Author Affiliations

       

      HÉLÈNE SOL1

      1. LUTH, CNRS, Observatoire de Paris, PSL Research University, Place J. Janssen, 92195 Meudon, France.

    • Dates

       
      Published
      30 August 2018
      Manuscript received
      24 July 2018
      Accepted
      6 August 2018
      Final version published online
      30 August 2018

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