ar X iv : 0 80 4 . 30 17 v 2 [ as tr o - ph ] 8 M ay 2 00 8 Gamma Rays from Centaurus A
نویسندگان
چکیده
Centaurus A, the cosmic ray accelerator a few Mpc away from us is possibly one of the nearest sources of extremely high energy cosmic rays. We investigate whether the gamma ray data currently available from Centaurus A in the GeV-TeV energy band can be explained with only proton proton interactions. We show that for a single power law proton spectrum, mechanisms of γ-ray production other than proton proton interactions are needed inside this radio-galaxy to explain the gamma ray flux observed by EGRET, upper limits by H.E.S.S./CANGAROO-III and the correlated extremely energetic cosmic ray events observed by the Pierre Auger experiment. In future with better γ-ray data, simultaneous observation with γ-ray and cosmic ray detectors, it would be possible to carry out such studies on different sources in more detail. keywords: ultra high energy cosmic rays, ultra high energy photons and neutrinos Gamma Rays from Centaurus A 2
منابع مشابه
ar X iv : 0 80 4 . 30 17 v 3 [ as tr o - ph ] 3 0 M ay 2 00 8 Gamma Rays from Centaurus A
Centaurus A, the cosmic ray accelerator a few Mpc away from us is possibly one of the nearest sources of extremely high energy cosmic rays. We investigate whether the gamma ray data currently available from Centaurus A in the GeV-TeV energy band can be explained with only proton proton interactions. We show that for a single power law proton spectrum, mechanisms of γ-ray production other than p...
متن کاملar X iv : 0 80 4 . 30 17 v 1 [ as tr o - ph ] 1 8 A pr 2 00 8 Gamma Rays from Centaurus A
Centaurus A, the cosmic ray accelerator a few Mpc away from us is one of the nearest sources of extremely high energy cosmic rays. It would be interesting to see whether the gamma ray data currently available from Centaurus A in the GeV-TeV energy band can be explained with only proton proton interactions. We show that to be consistent with the gamma ray luminosity observed in the GeV-TeV energ...
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1 Dipartimento di Fisica, Via Marzolo 8, 35131 Padova, Italy [email protected] 2 Observatoire de Paris, Section de Meudon, F-92195 Meudon Principal Cedex, France [email protected] 3 Stockholm Observatory, Albanova Universitetcentrum, SE-10691 Stockholm, Sweden [email protected] 4 Planetary Science Institute, Tucson, Arizona [email protected] 5 Observatoire de la Côte d’Azur, Nice, F...
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