Fast Variability of TeraElectron Volt γ Rays from the Radio Galaxy M87
Author:
Aharonian F.12345, Akhperjanian A. G.12345, Bazer-Bachi A. R.12345, Beilicke M.12345, Benbow W.12345, Berge D.12345, Bernlöhr K.12345, Boisson C.12345, Bolz O.12345, Borrel V.12345, Braun I.12345, Brown A. M.12345, Bühler R.12345, Büsching I.12345, Carrigan S.12345, Chadwick P. M.12345, Chounet L.-M.12345, Coignet G.12345, Cornils R.12345, Costamante L.12345, Degrange B.12345, Dickinson H. J.12345, Djannati-Ataï A.12345, Drury L. O'C.12345, Dubus G.12345, Egberts K.12345, Emmanoulopoulos D.12345, Espigat P.12345, Feinstein F.12345, Ferrero E.12345, Fiasson A.12345, Fontaine G.12345, Funk Seb.12345, Funk S.12345, Füßling M.12345, Gallant Y. A.12345, Giebels B.12345, Glicenstein J. F.12345, Goret P.12345, Hadjichristidis C.12345, Hauser D.12345, Hauser M.12345, Heinzelmann G.12345, Henri G.12345, Hermann G.12345, Hinton J. A.12345, Hoffmann A.12345, Hofmann W.12345, Holleran M.12345, Hoppe S.12345, Horns D.12345, Jacholkowska A.12345, de Jager O. C.12345, Kendziorra E.12345, Kerschhaggl M.12345, Khélifi B.12345, Komin Nu.12345, Konopelko A.12345, Kosack K.12345, Lamanna G.12345, Latham I. J.12345, Le Gallou R.12345, Lemière A.12345, Lemoine-Goumard M.12345, Lenain J.-P.12345, Lohse T.12345, Martin J. M.12345, Martineau-Huynh O.12345, Marcowith A.12345, Masterson C.12345, Maurin G.12345, McComb T. J. L.12345, Moulin E.12345, de Naurois M.12345, Nedbal D.12345, Nolan S. J.12345, Noutsos A.12345, Orford K. J.12345, Osborne J. L.12345, Ouchrif M.12345, Panter M.12345, Pelletier G.12345, Pita S.12345, Pühlhofer G.12345, Punch M.12345, Ranchon S.12345, Raubenheimer B. C.12345, Raue M.12345, Rayner S. M.12345, Reimer A.12345, Ripken J.12345, Rob L.12345, Rolland L.12345, Rosier-Lees S.12345, Rowell G.12345, Sahakian V.12345, Santangelo A.12345, Saugé L.12345, Schlenker S.12345, Schlickeiser R.12345, Schröder R.12345, Schwanke U.12345, Schwarzburg S.12345, Schwemmer S.12345, Shalchi A.12345, Sol H.12345, Spangler D.12345, Spanier F.12345, Steenkamp R.12345, Stegmann C.12345, Superina G.12345, Tam P. H.12345, Tavernet J.-P.12345, Terrier R.12345, Tluczykont M.12345, van Eldik C.12345, Vasileiadis G.12345, Venter C.12345, Vialle J. P.12345, Vincent P.12345, Völk H. J.12345, Wagner S. J.12345, Ward M.12345
Affiliation:
1. Max-Planck-Institut für Kernphysik, Post Office Box 103980, D 69029 Heidelberg, Germany. 2. Yerevan Physics Institute, 2 Alikhanian Brothers Street, 375036 Yerevan, Armenia. 3. Centre d'Etude Spatiale des Rayonnements, CNRS/UPS, 9 avenue du Colonel Roche, BP 4346, F-31029 Toulouse Cedex 4, France. 4. Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany. 5. Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D 12489 Berlin, Germany.
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.
Publisher
American Association for the Advancement of Science (AAAS)
Subject
Multidisciplinary
Cited by
290 articles.
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