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1.
The spectrum and morphology of the Fermi bubbles
Gabrijela Zaharijas, M. Ackermann, Adrien Albert, W. B. Atwood, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, R. Bellazzini, Elisabetta Bissaldi, R. D. Blandford, 2014, izvirni znanstveni članek

Najdeno v: ključnih besedah
Povzetek najdenega: ...high energy astrophysics, gamma-rays, diffuse background, ...
Ključne besede: high energy astrophysics, gamma-rays, diffuse background
Objavljeno: 09.05.2017; Ogledov: 1512; Prenosov: 13
URL Polno besedilo (0,00 KB)

2.
Science with e-ASTROGAM A space mission for MeV–GeV gamma-ray astrophysics
Gabrijela Zaharijas, 2018, izvirni znanstveni članek

Najdeno v: ključnih besedah
Ključne besede: gamma-ray astrophysics, new astrophysical instruments
Objavljeno: 11.12.2018; Ogledov: 658; Prenosov: 0
.pdf Polno besedilo (16,20 MB)

3.
On the GeV Emission of the Type I BdHN GRB 130427A
Laura Beccera, She Sheng Xue, Yu Wang, Narek Sahakyan, Mile Karlica, Yen-Chen Chen, Simonetta Filippi, Christian Cherubini, Carlo Luciano Bianco, Jorge Armando Rueda, Rahim Moradi, Remo Ruffini, 2019, izvirni znanstveni članek

Opis: 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.
Najdeno v: ključnih besedah
Povzetek najdenega: ...this "inner engine" can operate in a gamma-ray burst (GRB) for thousands of years. By... ...physics, binaries, gamma-ray burst, neutron stars, supernovae, Astrophysics - High Energy Astrophysical Phenomena...
Ključne besede: black hole physics, binaries, gamma-ray burst, neutron stars, supernovae, Astrophysics - High Energy Astrophysical Phenomena
Objavljeno: 20.07.2020; Ogledov: 299; Prenosov: 0
.pdf Polno besedilo (1,09 MB)

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