Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2012-01-19
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
Phys. Rev. D in press, This article supersedes arXiv:1007.0455
Scientific paper
Centaurus A (Cen A) is the nearest radio-loud AGN and is detected from radio to very high energy gamma-rays. Its nuclear spectral energy distribution (SED) shows a double-peak feature, which is well explained by the leptonic synchrotron + synchrotron self-Compton model. This model however cannot account for the observed high energy photons in the TeV range, which display a distinct component. Here we show that ~ TeV photons can be well interpreted as the neutral pion decay products from p-gamma interactions of Fermi accelerated high energy protons in the jet with the seed photons around the second SED peak at ~170 keV. Extrapolating the inferred proton spectrum to high energies, we find that this same model is consistent with the detection of 2 ultra-high-energy cosmic ray events detected by Pierre Auger Observatory from the direction of Cen A. We also estimate the GeV neutrino flux from the same process, and find that it is too faint to be detected by current high-energy neutrino detectors.
fraija Nissim
Sahu Sarira
Zhang Bing
No associations
LandOfFree
Hadronic-Origin TeV gamma-Rays and Ultra-High Energy Cosmic Rays from Centaurus A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hadronic-Origin TeV gamma-Rays and Ultra-High Energy Cosmic Rays from Centaurus A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hadronic-Origin TeV gamma-Rays and Ultra-High Energy Cosmic Rays from Centaurus A will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-320212