scholarly journals A Quasi-static Hyper-resistive Model of Ultra-high-energy Cosmic-ray Acceleration by Magnetically Collimated Jets Created by Active Galactic Nuclei

2019 ◽  
Vol 885 (1) ◽  
pp. 4 ◽  
Author(s):  
T. Kenneth Fowler ◽  
Hui Li ◽  
Richard Anantua
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Cosmic Ray Acceleration ◽  
Resistive Model

scholarly journals Ultra-high energy cosmic ray correlations with active galactic nuclei in the world dataset

JETP Letters ◽  
2012 ◽  
Vol 95 (10) ◽  
pp. 501-503
Author(s):  
G. I. Rubtsov ◽  
I. I. Tkachev ◽  
A. D. Dolgov
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
The World

scholarly journals Ultra-High Energy Cosmic Ray Production by Current Disruption in Active Galactic Nuclei

1985 ◽  
Vol 107 ◽  
pp. 471-473
Author(s):  
George Lake ◽  
R. E. Pudritz
Keyword(s):  
Active Galactic Nuclei ◽  
Current System ◽  
Galactic Nuclei ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Current Disruption ◽  
Inductive Circuit ◽  
Jet Plasma ◽  
Current Systems

Electrodynamic models for the activity of galactic nuclei are shown to be current systems which can be examined in terms of equivalent circuits. The resulting inductive circuit which describes the coupling of the generator (black-hole and accretion disk) to the distant load (jet plasma) is prone to various instabilities. We consider the disruption of this current system and propose that ultra-energetic cosmic rays (E~1019–1021 eV) could be produced during the discharges, which occur at distances of ~1016–1018 cm from the central massive hole (M~108 M). Such discharges will also produce variable γ-ray and X-ray activity and we discuss observations of Cen A in this regard.

scholarly journals Planck Neutrinos as Ultra High Energy Cosmic Rays

2020 ◽  
Vol 29 (1) ◽  
pp. 40-46
Author(s):  
Dmitri L. Khokhlov
Keyword(s):  
Black Holes ◽  
Cosmic Rays ◽  
Standard Model ◽  
Active Galactic Nuclei ◽  
Planck Scale ◽  
Galactic Nuclei ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
The Standard Model

AbstractThe studied conjecture is that ultra high energy cosmic rays (UHECRs) are hypothetical Planck neutrinos arising in the decay of the protons falling onto the gravastar. The proton is assumed to decay at the Planck scale into positron and four Planck neutrinos. The supermassive black holes inside active galactic nuclei, while interpreted as gravastars, are considered as UHECR sources. The scattering of the Planck neutrinos by the proton at the Planck scale is considered. The Planck neutrinos contribution to the CR events may explain the CR spectrum from 5 × 1018 eV to 1020 eV. The muon number in the Planck neutrinos-initiated shower is estimated to be larger by a factor of 3/2 in comparison with the standard model that is consistent with the observational data.

scholarly journals DO ACTIVE GALACTIC NUCLEI CONVERT DARK MATTER INTO VISIBLE PARTICLES?

2008 ◽  
Vol 23 (16) ◽  
pp. 1151-1159 ◽  
Author(s):  
A. A. GRIB ◽  
YU. V. PAVLOV
Keyword(s):  
Black Hole ◽  
Dark Matter ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
High Energy ◽  
Grand Unification ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Opposite Process ◽  
Penrose Process

The hypothesis that dark matter consists of superheavy particles with the mass close to the Grand Unification scale is investigated. These particles were created from vacuum by the gravitation of the expanding Universe and their decay led to the observable baryon charge. Some part of these particles with the lifetime larger than the time of breaking of the Grand Unification symmetry became metastable and survived up to the modern time as dark matter. However, in active galactic nuclei due to large energies of dark matter particles swallowed by the black hole and the possibility of the Penrose process for rotating black hole the opposite process can occur. Dark matter particles become interacting. Their decay on visible particles at the Grand Unification energies leads to the flow of ultra high energy cosmic rays observed by the Auger group. Numerical estimates of the effect leading to the observable numbers are given.

MAGNEOWAVE INDUCED PLASMA WAKEFIELD ACCELERATION AS A MECHANISM FOR UHECR

2011 ◽  
Vol 01 ◽  
pp. 151-156
Author(s):  
FENG-YIN CHANG ◽  
PISIN CHEN ◽  
GUEY-LIN LIN ◽  
ROBERT NOBLE ◽  
RICHARD SYDORA
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
High Energy ◽  
Plasma Simulation ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
High Energies ◽  
Wakefield Acceleration ◽  
Plasma Wakefield ◽  
Viable Mechanism

Magnetowave induced plasma wakefield acceleration (MPWA) in a relativistic astrophysical outflow has been proposed as a viable mechanism for the acceleration of cosmic particles to ultra high energies. In this paper we present the relativistic MPWA theory and confirm such a concept via the plasma simulation. Invoking Active Galactic Nuclei (AGN) as the site, we show that MPWA production of ultra high energy cosmic rays (UHECR) beyond ZeV (1021 eV) is possible.

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