The Origin Of Hard TeV Gamma Ray Of Blazars

Recent observations found that there are more and more hard Te V spec-trum blazars, these observations have challenged the classic SSC scenario. Hard TeV spectrum blazars are calculated in the frame of a hybrid of lepto-hadronic model. In this model, both protons and electrons are assumed to be acceler-ated to relativistic energies and have three spectral forms; nonthermal photons from radio to X-ray bands are mainly produced by the synchrotron radiation of the accelerated electrons, but in our model,leotonic model can not explain the hard TeV gamma-rays.Hard TeV gamma-rays are produced by the synchrotron radiation of the accelerated protons. Our results show that the proton syn-chrotron model can explain the very hard TeV spectra very well when protons are accelerated to extremely high energy.