Observable spectral and angular distributions of $\gamma$-rays from extragalactic ultrahigh energy cosmic ray accelerators: the case of extreme TeV blazars
作者： T.A. Dzhatdoev , E.V. Khalikov
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摘要: Ultrahigh energy protons and nuclei from extragalactic cosmic ray sources initiate intergalactic electromagnetic cascades, resulting in observable fluxes of $\gamma$-rays the GeV-TeV domain. The total spectrum such cascade hadronic nature is significantly harder than one usually expected blazars. spectra some known as "extreme TeV blazars" could be well-described by this "intergalactic model" (IHCM). We calculate shape point-like spectrum, well angular distibution $\gamma$-rays, for first time taking into account effect primary proton deflection filaments galaxy clusters magnetic field assuming model Dolag et al. (2005). present estimates width $\gamma$-ray distribution derived simple geometrical considerations. also employ a hybrid code to compute spectral distributions $\gamma$-rays. at multi-TeV energies much softer averaged over all values angle. presence high-energy cutoff extreme blazars framework IHCM facilitate future searches new physics processes that enhance apparent transparency Universe (for instance, $\gamma \rightarrow ALP$ oscillations). greater or comparable extent point spread function next-generation telescopes.
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arxiv.org参考文章(14)
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