Discovery of fast variability of the TeV γ‐ray flux from the giant radio galaxy M87 with H.E.S.S.

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Autor/in:
Erscheinungsjahr:
2007
Medientyp:
Text
Schlagworte:
  • AGN
  • Extragalactic objects
  • M 87
  • Radio galaxies
  • Variability
  • Very high energy γ-ray emission
Beschreibung:
  • The giant radio galaxy M87 was observed at GeV/TeV γ-ray energies with the H.E.S.S. (High Energy Stereoscopic System) Cherenkov telescopes in the years 2003-2006. The observations confirm M 87 as the first extragalactic TeV γ-ray source not of the blazar type (first indications of a signal were reported by the HEGRA collaboration earlier). The TeV γ-ray flux as measured with H.E.S.S. is variable on time-scales of days which strongly constrains the size of the emission region, excluding several models. The H.E.S.S. results and theoretical interpretations are presented in this paper. © 2007 American Institute of Physics.
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  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/dfcbf8c5-b1a0-471a-ab85-aaa7b177c720