Ultrahigh-energy cosmic ray interactions as the origin of very high energy $\gamma-$rays from BL Lacs.
作者： Saikat Das , Nayantara Gupta , Soebur Razzaque
关键词: Physics 、 Spectral density 、 Cosmic ray 、 Gamma ray 、 Photon 、 Extragalactic background light 、 Luminosity 、 Spectral energy distribution 、 Astrophysics 、 Hadron
摘要: We explain the observed multiwavelength photon spectrum of a number BL Lac objects detected at very high energy (VHE, $E \gtrsim 30$ GeV), using lepto-hadronic emission model. The one-zone leptonic is employed to fit synchrotron peak. Subsequently, SSC calculated, such that it extends up highest possible for jet parameters considered. data points beyond this energy, and also in entire VHE range are well explained hadronic ultrahigh-energy cosmic rays (UHECRs, $E\gtrsim 0.1$ EeV) escaping from source interact with extragalactic background light (EBL) during propagation over cosmological distances initiate electromagnetic cascade down $\sim1$ GeV energies. resulting peaks TeV consider random turbulent magnetic field (EGMF) Kolmogorov power find survival rate UHECRs within 0.1 degrees direction which observer situated. restrict ourselves an RMS value EGMF, $B_{\rm rms}\sim 10^{-5}$ nG, significant contribution spectral distribution (SED) UHECR interactions. found interactions on EBL secondary can gamma-ray Lacs we considered required luminosity corresponding below Eddington luminosities super-massive black holes these Lacs.
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