HADRON-INITIATED EMISSION PROCESSES IN BLAZAR JETS

2009 ◽  
Vol 18 (10) ◽  
pp. 1511-1515 ◽  
Author(s):  
ANITA REIMER
Keyword(s):  
Relativistic Electrons ◽  
Electrons And Positrons ◽  
Extragalactic Jets ◽  
Emission Models ◽  
Relativistic Matter

Despite many advances in AGN physics, observationally as well as theoretically, the relativistic matter composition of extragalactic jets remains concealed. In contrast to the so called leptonic AGN emission models, hadronic models consider relativistic protons to be present in those sources, in addition to the relativistic electrons and positrons, and possibly cold material. Here I briefly discuss most processes that are commonly believed to characterize the so-called hadronic AGN emission models, and these include leptonic as well as hadronic processes. As an application predictions for the neutrino output during the TeV-flare of 3C 279 in 2006 are provided.

scholarly journals Simulation of ultra-relativistic electrons and positrons channeling in crystals with MBN Explorer

2013 ◽  
Vol 252 ◽  
pp. 404-418 ◽  
Author(s):  
Gennady B. Sushko ◽  
Victor G. Bezchastnov ◽  
Ilia A. Solovʼyov ◽  
Andrei V. Korol ◽  
Walter Greiner ◽  
...  
Keyword(s):  
Relativistic Electrons ◽  
Electrons And Positrons

New module for channeling radiation simulation in Geant4

2021 ◽  
Vol 16 (12) ◽  
pp. P12042
Author(s):  
A.A. Savchenko ◽  
W. Wagner
Keyword(s):  
Experimental Data ◽  
Single Crystals ◽  
Dipole Approximation ◽  
Relativistic Electrons ◽  
Planar Channeling ◽  
Classical Approach ◽  
Electrons And Positrons ◽  
Simulation Results ◽  
Channeling Radiation ◽  
Good Agreement

Abstract We present a new C++ module for simulation of channeling radiation to be implemented in Geant4 as a discrete physical process. The module allows simulation of channeling radiation from relativistic electrons and positrons with energies above 100 MeV for various types of single crystals. In this paper, we simulate planar channeling radiation applying the classical approach in the dipole approximation as a first attempt not yet considering other contributory processes. Simulation results are proved to be in a rather good agreement with experimental data.

scholarly journals First millimeter Mapping of the jet and nucleus of M87

1996 ◽  
Vol 175 ◽  
pp. 175-176
Author(s):  
V. Despringre ◽  
D. Fraix-Burnet
Keyword(s):  
Thermal Emission ◽  
Cutoff Frequency ◽  
Low Frequency ◽  
High Sensitivity ◽  
Model Parameters ◽  
Relativistic Electrons ◽  
Extragalactic Jets ◽  
Molecular Lines ◽  
Optical Wavelengths ◽  
Cold Dust

An intriguing question about extragalactic jets is why they are so few being seen at optical wavelengths, or equivalently, why the cutoff frequency of the synchrotron radiation is generally not in the optical, but rather in the infrared or even in the sub- millimeter domain. The answer is undoubtedly related to the efficiency of the acceleration of the relativistic electrons responsible for the synchrotron emission. The presence of a break at low frequency somewhere in the synchrotron spectrum is another feature that constrains the model parameters, but its precise location is unknown for most jets, because of the lack of photometry in the millimeter domain. It was thus necessary to fill the gap between radio and optical wavelengths in the synchrotron spectrum of optical jets. The required observation had to be of high sensitivity and high spatial resolution (of the order of 1″). Another reason for observing at millimeter wavelengths is that molecular lines and thermal emission from cold dust are detectable in this frequency range.

scholarly journals QUANTUM ELECTRODYNAMICS OF RELATIVISTIC BOUND STATES WITH CUTOFFS

2004 ◽  
Vol 01 (02) ◽  
pp. 271-314 ◽  
Author(s):  
JEAN-MARIE BARBAROUX ◽  
MOUEZ DIMASSI ◽  
JEAN-CLAUDE GUILLOT
Keyword(s):  
Current Density ◽  
Coulomb Potential ◽  
Ground State ◽  
Quantum Electrodynamics ◽  
Bound States ◽  
Coupling Constants ◽  
Relativistic Electrons ◽  
Small Coupling ◽  
Electrons And Positrons ◽  
Relativistic Bound States

We consider a Hamiltonian with ultraviolet and infrared cutoffs, describing the interaction of relativistic electrons and positrons in the Coulomb potential with photons in Coulomb gauge. The interaction includes both interaction of the current density with transversal photons and the Coulomb interaction of charge density with itself. We prove that the Hamiltonian is self-adjoint and has a ground state for sufficiently small coupling constants.

Semiclassical relativistic fluid theory for electrostatic envelope modes in dense electron–positron–ion plasmas: Modulational instability and rogue waves

2013 ◽  
Vol 79 (6) ◽  
pp. 1089-1094 ◽  
Author(s):  
IOANNIS KOURAKIS ◽  
MICHAEL MC KERR ◽  
ATA UR-RAHMAN
Keyword(s):  
Fluid Model ◽  
Modulational Instability ◽  
Rogue Waves ◽  
Relativistic Electrons ◽  
Relativistic Fluid ◽  
Ion Plasma ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
Perturbative Method ◽  
Fluid Theory

AbstractA fluid model is used to describe the propagation of envelope structures in an ion plasma under the influence of the action of weakly relativistic electrons and positrons. A multiscale perturbative method is used to derive a nonlinear Schrödinger equation for the envelope amplitude. Criteria for modulational instability, which occurs for small values of the carrier wavenumber (long carrier wavelengths), are derived. The occurrence of rogue waves is briefly discussed.

Characteristics and Applications of Channeling Radiation from Relativistic Electrons and Positrons

1981 ◽  
Vol 28 (2) ◽  
pp. 1152-1155 ◽  
Author(s):  
R. H. Pantell ◽  
R. L. Swent ◽  
S. Datz ◽  
M. J. Alguard ◽  
B. L. Berman ◽  
...  
Keyword(s):  
Relativistic Electrons ◽  
Electrons And Positrons ◽  
Channeling Radiation
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