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Title: On the GeV Emission of the Type I BdHN GRB 130427A Ruffini, Remo (Author)Moradi, Rahim (Author)Rueda, Jorge Armando (Author)Bianco, Carlo Luciano (Author)Cherubini, Christian (Author)Filippi, Simonetta (Author)Chen, Yen-Chen (Author)Karlica, Mile (Author)Sahakyan, Narek (Author)Wang, Yu (Author)Xue, She Sheng (Author)Beccera, Laura (Author) This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. English Not categorized (r6) 1.01 - Original Scientific Article UNG - University of Nova Gorica We propose that the inner engine of a type I binary-driven hypernova (BdHN) is composed of Kerr black hole (BH) in a non-stationary state, embedded in a uniform magnetic field B_0 aligned with the BH rotation axis and surrounded by an ionized plasma of extremely low density of 10^−14 g cm−3. Using GRB 130427A as a prototype, we show that this inner engine acts in a sequence of elementary impulses. Electrons accelerate to ultrarelativistic energy near the BH horizon, propagating along the polar axis, θ = 0, where they can reach energies of ~10^18 eV, partially contributing to ultrahigh-energy cosmic rays. When propagating with $\theta \ne 0$ through the magnetic field B_0, they produce GeV and TeV radiation through synchroton emission. The mass of BH, M = 2.31M ⊙, its spin, α = 0.47, and the value of magnetic field B_0 = 3.48 × 10^10 G, are determined self consistently to fulfill the energetic and the transparency requirement. The repetition time of each elementary impulse of energy ${ \mathcal E }\sim {10}^{37}$ erg is ~10^−14 s at the beginning of the process, then slowly increases with time evolution. In principle, this "inner engine" can operate in a gamma-ray burst (GRB) for thousands of years. By scaling the BH mass and the magnetic field, the same inner engine can describe active galactic nuclei. black hole physics, binaries, gamma-ray burst, neutron stars, supernovae, Astrophysics - High Energy Astrophysical Phenomena 2019 13 2, 886 23009283 URN:SI:UNG:REP:BXWOORI6 https://doi.org/10.3847/1538-4357/ab4ce6 1601 0 Document is not linked to any category.

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## Record is a part of a journal

Title: The Astrophysical Journal The American Astronomical Society 2019

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