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Relevant bibliographies by topics / Nonthermal positrons

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Academic literature on the topic 'Nonthermal positrons'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Nonthermal positrons"

1

P, C. Singhadiya, and K. Chawla J. "Effect of positrons and nonthermal electrons on large amplitude ion-acoustic soliton in unmagnetized plasmas." European Journal of Advances in Engineering and Technology 10, no. 11s (2023): 127–36. https://doi.org/10.5281/zenodo.10639419.

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<strong>ABSTRACT</strong> The large amplitude of an ion-acoustic soliton in a plasma consisting of ions, positrons and nonthermal electrons is considered the pseudo-potential method (SPM). An energy integral equation for the system has been derived with the help of SPM. It is found that compressive and rarefactive solitons exist in the plasma system for selected set of plasma parameters. It is also found that the effect of nonthermal parameters   positron concentration ionic temperature ratio positron temperature ratio and Mach number (M) on the characteristics of the large amplitude

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2

Ghosh, Basudev, and Sreyasi Banerjee. "Modulation Instability of Ion-Acoustic Waves in Plasma with Nonthermal Electrons." Journal of Astrophysics 2014 (July 16, 2014): 1–8. http://dx.doi.org/10.1155/2014/785670.

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Modulational instability of ion-acoustic waves has been theoretically investigated in an unmagnetized collisionless plasma with nonthermal electrons, Boltzmann positrons, and warm positive ions. To describe the nonlinear evolution of the wave amplitude a nonlinear Schrödinger (NLS) equation has been derived by using multiple scale perturbation technique. The nonthermal parameter, positron concentration, and ion temperature are shown to play significant role in the modulational instability of ion-acoustic waves and the formation of envelope solitons.

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3

McMullen, T., and M. J. Stott. "Resonance trapping of nonthermal positrons." Physical Review B 34, no. 12 (1986): 8985–88. http://dx.doi.org/10.1103/physrevb.34.8985.

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4

Lynn, K. G., T. McKay, and Bent Nielsen. "Trapping of nonthermal positrons in metals." Physical Review B 36, no. 13 (1987): 7107–10. http://dx.doi.org/10.1103/physrevb.36.7107.

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5

Wilson, A. S., and K. W. Weiler. "Relativistic Positrons in Nonthermal Radio Sources." Astrophysical Journal 475, no. 2 (1997): 661–64. http://dx.doi.org/10.1086/303581.

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6

Hirotani, Kouichi, Hsien 賢. Shang 尚, Ruben Krasnopolsky, and Kenichi Nishikawa. "R-JET: A Postprocessing Code for Radiative Transport in Relativistic Jets." Astrophysical Journal 984, no. 1 (2025): 16. https://doi.org/10.3847/1538-4357/adbaf2.

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Abstract We describe a postprocessing radiative transport code for computing the spectra, the core shift, and the surface-brightness distribution of special relativistic jets with arbitrary optical thickness. The jet consists of an electron–positron pair plasma and an electron–proton normal plasma. Electrons and positrons are relativistic and composed of thermal and nonthermal components, while protons are nonrelativistic and nonradiating. The fraction of a pair plasma, as well as the fraction of a nonthermal component, can be arbitrarily chosen. Only the synchrotron process is considered for

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7

Rahman, M. M., A. A. Mamun, and M. S. Alam. "Positron acoustic shock waves in four-component plasmas with nonthermal electrons and positrons." Journal of the Korean Physical Society 64, no. 12 (2014): 1828–33. http://dx.doi.org/10.3938/jkps.64.1828.

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8

Gramsch, E., and K. G. Lynn. "Trapping model for thermal and nonthermal positrons in metals." Physical Review B 40, no. 4 (1989): 2537–40. http://dx.doi.org/10.1103/physrevb.40.2537.

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9

Tian, Shiting, Liancheng Zhou, Yunlu Gong, Keyao Wu, Jun Fang, and Huan Yu. "Investigating the Multiband Nonthermal Radiative Properties of HESS J1420−607." Publications of the Astronomical Society of the Pacific 135, no. 1049 (2023): 074503. http://dx.doi.org/10.1088/1538-3873/ace3f8.

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Abstract HESS J1420−607 is a γ-ray emitting source associated with the pulsar wind nebula (PWN) powered by the energetic pulsar PSR J1420−6048. Based on 14 yr of data obtained with the Fermi Large Area Telescope, we re-analyzed its GeV γ-ray radiative properties, resulting in detailed spectra obtained within the band 10–200 GeV. Moreover, we use a one-zone time-dependent model for the multiband nonthermal emission from pulsar wind nebulae to investigate the radiative properties of the nebula associated with HESS J1420−607. Assuming that the electrons/positrons are injected into the PWN with a

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10

Berg, D., M. Mentzel, and G. Wunner. "Polarized One-Quantum Annihilation in Strong Magnetic Fields as a Process for Particle Deceleration in Neutron Star Atmospheres." International Astronomical Union Colloquium 142 (1994): 905–7. http://dx.doi.org/10.1017/s0252921100078295.

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AbstractSince several gamma-ray bursts seem to have their origin in the vicinity of neutron stars, where strong magnetic fields are present (B ≃ 108T), electrons and positrons have to be described, in this instance, by relativistic Landau states. As is well known, strong magnetic fields produce important effects: motion perpendicular to the field is quantized, transverse momentum is not conserved, and polarization effects become important. Moreover, in contrast to the field-free case, exotic processes such as 1γ pair-annihilation are not forbidden. With growing magnetic field, the cross sectio

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Books on the topic "Nonthermal positrons"

1

Michael, Kellen, and United States. National Aeronautics and Space Administration., eds. Disk-corona model of active galactic nuclei with nonthermal pairs. National Aeronautics and Space Administration, 1995.

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2

Michael, Kellen, and United States. National Aeronautics and Space Administration., eds. Disk-corona model of active galactic nuclei with nonthermal pairs. National Aeronautics and Space Administration, 1995.

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Michael, Kellen, and United States. National Aeronautics and Space Administration., eds. Disk-corona model of active galactic nuclei with nonthermal pairs. National Aeronautics and Space Administration, 1995.

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Michael, Kellen, and United States. National Aeronautics and Space Administration., eds. Disk-corona model of active galactic nuclei with nonthermal pairs. National Aeronautics and Space Administration, 1995.

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Book chapters on the topic "Nonthermal positrons"

1

Rahman, Md Obaidur, Sagar Barua, Md Golam Hafez, and Mohammad Abu Kauser. "Propagation of Ion Acoustic Solitons Around the Critical Values in Weakly Relativistic Unmagnetized Plasmas Having Nonthermal Distributed Electrons and Positrons." In Springer Proceedings in Physics. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-66874-6_3.

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2

Zdziarski, Andrzej A., and Paolo S. Coppi. "Variable Soft X-Ray Excesses in AGN from Nonthermal Electron-Positron Pair Cascades." In Physics of Active Galactic Nuclei. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-77566-6_7.

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Conference papers on the topic "Nonthermal positrons"

1

Jensen, Kjeld O., and Alison B. Walker. "Positron thermalisation and nonthermal trapping in aluminium." In 4th International workshop on: Slow−positron beam techniques for solids and surfaces. AIP, 1991. http://dx.doi.org/10.1063/1.40203.

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Zdziarski, Andrzej A. "Nonthermal electron-positron pairs and cold matter in the central engines of active galactic nuclei." In Testing the AGN paradigm diagnostics. AIP, 1992. http://dx.doi.org/10.1063/1.42199.

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