Energy spectra of gamma-rays, electrons and neutrinos produced at interactions of relativistic protons with low energy radiation

By S. Kelner, F. Aharonian. 2008

170 citations recorded by the source corpus.

We derived simple analytical parametrizations for energy distributions of photons, electrons, and neutrinos produced in interactions of relativistic protons with an isotropic monochromatic radiation field. The results on photomeson processes are obtained using numerical simulations of proton-photon interactions based on the public available Monte Carlo code SOPHIA. For calculations of energy spectra of electrons and positrons from the pair-production (Bethe-Heitler) process we suggest a simple formalism based on the well-known differential cross section of the process in the rest frame of the proton. The analytical presentations of energy distributions of photons and leptons provide a simple but accurate approach for calculations of broadband energy spectra of gamma rays and neutrinos in cosmic proton accelerators located in radiation dominated environments.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/1dec2af7c1d4eac8dfd66ef4f8712434e461fc86

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In Nuclear and High Energy Physics

1. F. Tavecchio
2. L. Maraschi
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6. Kohta Murase
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Citations in the corpus

• A hadronic origin for ultra-high-frequency-peaked BL Lac objects (2014, methodology): “The pairs injected into the emitting region through this process have been computed using the analytical formulae by Kelner & Aharonian (2008) (in which the Bethe-Heitler cross-section is expressed following the work by Blumenthal 1970).”
• The Blazar TXS 0506+056 Associated with a High-energy Neutrino: Insights into Extragalactic Jets and Cosmic-Ray Acceleration (2018, methodology): “The direct products of pγ reactions including neutrinos and photons are described using the analytical treatment of Kelner & Aharonian (2008).”
• Leptohadronic single-zone models for the electromagnetic and neutrino emission of TXS 0506+056 (2018, methodology): “Photo-meson interactions are calculated using the Monte-Carlo code SOPHIA (Mücke et al. 2000), while Bethe-Heitler pair-production (not included in SOPHIA) is calculated using the analytical formulae of Kelner & Aharonian (2008).”
• Blazar Flares as an Origin of High-energy Cosmic Neutrinos? (2018, background): “The Bethe-Heitler process also injects high-energy pairs with γ′e ≈ 5 × 10 −4ε′p/(mec 2) ≃ 2.9 × 105 (εp/6 PeV)(20/δ) (e.g. Mastichiadis & Kirk 1995); even more energetic pairs can be produced by interactions happening far from the energy threshold of the process (e.g. Kelner & Aharonian 2008).”