Author(s): Aharonian F., Feinstein F., Fiasson A., Gallant Y., Jacholkowska Agnieszka, Komin Nukri, Moulin Emmanuel, Vasileiadis G., Bazer-Bachi A.R., Boisson C., Borrel V., Chounet L.-M., Coignet G., Degrange B., Djannati-Ataï A., Dubus G., Espigat P., Fontaine G., Giebels B., Glicenstein J.F., Goret P., Henri G., Khélifi B., Lamanna G., Lemière A., Lemoine-Goumard M., Lenain J.-P., Martin J.M.
(Article) Published:
Annual Review Of Nuclear And Particle Science, vol. 314 p.1424-1427 (2006)
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Ref HAL: in2p3-00118136_v1
Ref Arxiv: astro-ph/0612016
DOI: 10.1126/science.1134408
Ref. & Cit.: NASA ADS
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252 citations
Abstract:
The detection of fast variations of the TeV (10^12 eV) gamma-ray flux, on time-scales of days, from the nearby radio galaxy M 87 is reported. These variations are ~10 times faster than that observed in any other waveband 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 gamma-ray production. The observations confirm that TeV gamma-rays are emitted by extragalactic sources other than blazars, where jets are not relativistically beamed towards the observer.
Comments: 16 pages, 5 figures