Photogeneration of an electron-positron pair and a photon in a magnetic field with polarization effects taken into account

1982 ◽  
Vol 25 (4) ◽  
pp. 339-342
Author(s):  
A. A. Sokolov ◽  
V. Ch. Zhukovskii ◽  
G. V. Kormil'tsev ◽  
P. A. �minov
Keyword(s):  
Magnetic Field ◽  
Polarization Effects ◽  
Electron Positron ◽  
Electron Positron Pair

scholarly journals Modes of Energy Loss from Isolated Magnetized Neutron Star

1987 ◽  
Vol 125 ◽  
pp. 450-450
Author(s):  
S. Shibata
Keyword(s):  
Magnetic Field ◽  
Neutron Star ◽  
Gamma Ray ◽  
Rotational Energy ◽  
Pair Creation ◽  
Dipole Radiation ◽  
Pair Plasma ◽  
Electron Positron ◽  
Closed Current ◽  
Electron Positron Pair

Pulsar may be regarded as a discharge tube by electron-positron pair creation. On this viewpoint we carry out two numerical calculations. The obtained magnetic field is consistent with the flow. We find that pulsars emit their rotational energy through three modes simultaneously. The three modes are (1)relativistic acceleration and following gamma-ray emission in the closed current circuit in the magnetosphere, (2)wind of the electron-positron pair plasma, and (3)dipole radiation.

scholarly journals General Discussion of Accretion Disks

1999 ◽  
Vol 194 ◽  
pp. 321-322
Author(s):  
Vahagn G. Gurzadyan
Keyword(s):  
Magnetic Field ◽  
Accretion Disks ◽  
Galactic Nuclei ◽  
The Other ◽  
Seminal Paper ◽  
Physical Conditions ◽  
Electron Positron ◽  
Free Parameters ◽  
The Stability ◽  
Electron Positron Pair

Even 25 years after the Shakura-Sunyaev seminal paper on the α-disk, we cannot claim that we have a reliable theory of accretion disks in galactic nuclei. Why? Because the problem is extremely complicated, it is essentially nonlinear and contains a number of parameters (i.e. is many-dimensional). The key point is whether it is possible to determine the magneto-hydrodynamical viscosity self-consistently, i.e. as a function of parameters of the disk - the temperature, matter and radiation densities, magnetic field, radius, etc., both in the radiation dominated and matter dominated regions. Another class of fundamental problems concerns the stability of the disk; Krolik mentioned only one instability - in the radiation dominated region, but there are many other types of instabilities which are quite sensitive to the physical conditions in the disk, for example, to the anisotropy of the ion pressure in the outer regions and possible electron-positron pair production near the inner edge of the disk. The other problems include those of the radiative transfer within the disk in various conditions, Comptonization of the outgoing radiation, radiation reflections by the desk, etc. Therefore it is not suprising that one can ‘explain' almost whatever he wants - spectra, variability, jets, wind, etc., by proper fit of the ‘free’ (which are never free) parameters and ignoring the instabilities and so on.

scholarly journals Electron-Positron Pair Photoproduction in a Strong Magnetic Field Through the Polarization Cascade

2020 ◽  
Vol 65 (3) ◽  
pp. 187
Author(s):  
M. Diachenko ◽  
O. Novak ◽  
R. Kholodov ◽  
A. Fomina
Keyword(s):  
Magnetic Field ◽  
Pair Production ◽  
Strong Magnetic Field ◽  
Single Photon ◽  
Threshold Value ◽  
Pair Creation ◽  
Landau Levels ◽  
Radiation Correction ◽  
Electron Positron ◽  
Electron Positron Pair

The process of the e−e+ pair photoproduction in a strong magnetic field through the polarization cascade (the creation of an e−e+ pair from a single photon and its subsequent annihilation to a single photon) has been considered. The kinematics of the process is analyzed, and the expression for the general amplitude is obtained. A radiation correction to the process of pair creation at the lowest Landau levels by a single photon is found in the case where the energy of this photon is close to the threshold value. A comparison with the process of e−e+ pair production by one photon is made.

Electron-positron pair generation by a neutrino in a magnetic field

1983 ◽  
Vol 26 (8) ◽  
pp. 701-704 ◽  
Author(s):  
A. V. Borisov ◽  
V. Ch. Zhukovskii ◽  
B. A. Lysov
Keyword(s):  
Magnetic Field ◽  
Electron Positron ◽  
Pair Generation ◽  
Electron Positron Pair
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