On the GeV Emission of the Type I BdHN GRB 130427A

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 B0 aligned with the BH rotation axis and surrounded by an ionized plasma of extremely low density of 10−14 g cm−3. Using GRB...

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Bibliographic Details
Published in:The Astrophysical journal 2019-12, Vol.886 (2), p.82
Main Authors: Ruffini, R., Moradi, R., Rueda, J. A., Becerra, L., Bianco, C. L., Cherubini, C., Filippi, S., Chen, Y. C., Karlica, M., Sahakyan, N., Wang, Y., Xue, S. S.
Format: Article
Language:English
Subjects:
Active galactic nuclei
Astrophysics
binaries: general
black hole physics
Cosmic ray propagation
Cosmic rays
Emission
Gamma ray bursts
Gamma rays
gamma-ray burst: general
High energy astronomy
Magnetic fields
Radiation
Rotating plasmas
stars: neutron
supernovae: general
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Summary: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 B0 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 ∼1018 eV, partially contributing to ultrahigh-energy cosmic rays. When propagating with through the magnetic field B0, they produce GeV and TeV radiation through synchroton emission. The mass of BH, M = 2.31M , its spin, = 0.47, and the value of magnetic field B0 = 3.48 × 1010 G, are determined self consistently to fulfill the energetic and the transparency requirement. The repetition time of each elementary impulse of energy 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.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ab4ce6