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Fast variability of tera-electron volt γ rays from the radio galaxy M87

  • F. Aharonian
  • , A. G. Akhperjanian
  • , A. R. Bazer-Bachi
  • , M. Beilicke
  • , W. Benbow
  • , D. Berge
  • , K. Bernlöhr
  • , C. Boisson
  • , O. Bolz
  • , V. Borrel
  • , I. Braun
  • , A. M. Brown
  • , R. Bühler
  • , I. Büsching
  • , S. Carrigan
  • , P. M. Chadwick
  • , L. M. Chounet
  • , G. Coignet
  • , R. Cornils
  • , L. Costamante
  • B. Degrange, H. J. Dickinson, A. Djannati-Ataï, L. O.C. Drury, G. Dubus, K. Egberts, D. Emmanoulopoulos, P. Espigat, F. Feinstein, E. Ferrero, A. Fiasson, G. Fontaine, Seb Funk, S. Funk, M. Füßling, Y. A. Gallant, B. Giebels, J. F. Glicenstein, P. Goret, C. Hadjichristidis, D. Hauser, M. Hauser, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, A. Hoffmann, W. Hofmann, M. Holleran, S. Hoppe, D. Horns, A. Jacholkowska, O. C. De Jager, E. Kendziorra, M. Kerschhaggl, B. Khélifi, Nu Komin, A. Konopelko, K. Kosack, G. Lamanna, I. J. Latham, R. Le Gallou, A. Lemière, M. Lemoine-Goumard, J. P. Lenain, T. Lohse, J. M. Martin, O. Martineau-Huynh, A. Marcowith, C. Masterson, G. Maurin, T. J.L. McComb, E. Moulin, M. De Naurois, D. Nedbal, S. J. Nolan, A. Noutsos, K. J. Orford, J. L. Osborne, M. Ouchrif, M. Panter, G. Pelletier, S. Pita, G. Pühlhofer, M. Punch, S. Ranchon, B. C. Raubenheimer, M. Raue, S. M. Rayner, A. Reimer, J. Ripken, L. Rob, L. Rolland, S. Rosier-Lees, G. Rowell, V. Sahakian, A. Santangelo, L. Saugé, S. Schlenker, R. Schlickeiser, R. Schröder, U. Schwanke, S. Schwarzburg, S. Schwemmer, A. Shalchi, H. Sol, D. Spangler, F. Spanier, R. Steenkamp, C. Stegmann, G. Superina, P. H. Tam, J. P. Tavernet, R. Terrier, M. Tluczykont, C. Van Eldik, G. Vasileiadis, C. Venter, J. P. Vialle, P. Vincent, H. J. Völk, S. J. Wagner, M. Ward
  • Max-Planck-Institut für Kernphysik
  • Yerevan Physics Institute
  • Centre national de la recherche scientifique
  • Universität Hamburg
  • Institut für Physik
  • Humboldt-Universität zu Berlin
  • Laboratoire Univers et Théories
  • Department of Physics
  • Durham University
  • Unit for Space Physics
  • North-West University
  • Ip Paris
  • Université Paris-Sud
  • European Associated Laboratory for Gamma-Ray Astronomy
  • Astroparticule and Cosmol APC
  • Dublin Institute for Advanced Studies
  • Landessternwarte Heidelberg
  • Laboratoire Univers et Particules de Montpellier
  • Institut Pierre Simon Laplace, CNRS and CEA
  • Division Technique
  • Institut für Astronomie und Astrophysik
  • University of Tübingen
  • Department of Physics
  • Purdue University
  • Universités Paris VI and VII
  • Charles University
  • Institut für Theoretische Physik
  • Ruhr-University Bochum
  • University of Namibia
  • Physikalisches Institut
  • Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen

Research output: Contribution to journal › Article › peer-review

364 Citations (Scopus)

Abstract

The detection of fast variations of the tera-electron volt (TeV) (10 12 eV) γ-ray flux, on time scales of days, from the nearby radio galaxy M87 is reported. These variations are about 10 times as fast as those observed in any other wave band and imply a very compact emission region with a dimension similar to the Schwarzschild radius of the central black hole. We thus can exclude several other sites and processes of the γ-ray production. The observations confirm that TeV γ rays are emitted by extragalactic sources other than blazars, where jets are not relativistically beamed toward the observer.

Original languageEnglish
Pages (from-to)1424-1427
Number of pages4
JournalScience
Volume314
Issue number5804
DOIs
Publication statusPublished - 1 Dec 2006
Externally publishedYes

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