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

Aharonian, F. and Akhperjanian, A. G. and Bazer-Bachi, A. R. and Beilicke, M. and Benbow, W. and Berge, D. and Bernlöhr, K. and Boisson, C. and Bolz, O. and Borrel, V. and Braun, I. and Brown, A. M. and Bühler, R. and Büsching, I. and Carrigan, S. and Chadwick, P. M. and Chounet, L.-M. and Coignet, G. and Cornils, R. and Costamante, L. and Degrange, B. and Dickinson, H. J. and Djannati-Ataï, A. and Drury O'C., L. and Dubus, G. and Egberts, K. and Emmanoulopoulos, D. and Espigat, P. and Feinstein, F. and Ferrero, E. and Fiasson, A. and Fontaine, G. and Funk, S. and Füßling, M. and Gallant, Y. A. and Giebels, B. and Glicenstein, J. F. and Goret, P. and Hadjichristidis, C. and Hauser, D. and Hauser, M. and Heinzelmann, G. and Henri, G. and Hermann, G. and Hinton, J. A. and Hoffmann, A. and Hofmann, W. and Holleran, M. and Hoppe, S. and Horns, D. and Jacholkowska, A. and de Jager, O. C. and Kendziorra, E. and Kerschhaggl, M. and Khélifi, B. and Komin, N. and Konopelko, A. and Kosack, K. and Lamanna, G. and Latham, I. J. and Le Gallou, R. and Lemière, A. and Lemoine-Goumard, M. and Lenain, J. P. and Lohse, T. and Martin, J. M. and Martineau-Huynh, O. and Marcowith, A. and Masterson, C. and Maurin, G. and McComb, T. J. L. and Moulin, E. and de Naurois, M. and Nedbal, D. and Nolan, S. J. and Noutsos, A. and Orford, K. J. and Osborne, J. L. and Ouchrif, M. and Panter, M. and Pelletier, G. and Pita, S. and Pühlhofer, G. and Punch, M. and Ranchon, S. and Raubenheimer, B. C. and Raue, M. and Rayner, S. M. and Reimer, A. and Ripken, J. and Rob, L. and Rolland, L. and Rosier-Lees, S. and Rowell, G. and Sahakian, V. and Santangelo, A. and Saugé, L. and Schlenker, S. and Schlickeiser, R. and Schröder, R. and Schwanke, U. and Schwarzburg, S. and Schwemmer, S. and Shalchi, A. and Sol, H. and Spangler, D. and Spanier, F. and Steenkamp, R. and Stegmann, C. and Superina, G. and Tam, P. H. and Tavernet, J.-P. and Terrier, R. and Tluczykont, M. and van Eldik, C. and Vasileiadis, G. and Venter, C. and Vialle, J. P. and Vincent, P. and Völk, H. J. and Wagner, S. J. and Ward, M. J. (2006) 'Fast variability of tera-electron volt gamma rays from the radio galaxy M87.', Science., 314 (5804). pp. 1424-1427.


The detection of fast variations of the tera–electron volt (TeV) (1012 eV) -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 -ray production. The observations confirm that TeV rays are emitted by extragalactic sources other than blazars, where jets are not relativistically beamed toward the observer.

Item Type:Article
Additional Information:
Keywords:Black-hole, TEV emission, Cosmic-rays, Jet, HST-1, M-87, Nucleus, Knot.
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Record Created:16 Jul 2007
Last Modified:08 Apr 2009 16:34

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