Gamma Rays from Centaurus A

Abstract

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 $\gamma$-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 $\gamma$-ray data, simultaneous observation with $\gamma$-ray and cosmic ray detectors, it would be possible to carry out such studies on different sources in more detail.

7 pages, JCAP in press

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Cited by in corpus (8)

• Ultra High Energy Cosmic Rays from Black Hole Jets of Radio Galaxies
• Hadronic-Origin TeV gamma-Rays and Ultra-High Energy Cosmic Rays from Centaurus A
• Very high energy neutrino emission from the core of low luminosity AGNs triggered by magnetic reconnection acceleration
• On the relation between the neutrino flux from Centaurus A and the associated diffuse neutrino flux
• Testing Hadronic Models of Gamma Ray Production at the Core of Cen A
• Probing Lorentz Invariance at EeV Energy
• Photo-Disintegration of Heavy Nuclei at the Core of Cen A
• Very high energy emission mechanism in the extreme blazar PGC 2402248