Modified Ion-Acoustic Shock Waves and Double Layers in a Degenerate Electron-Positron-Ion Plasma in Presence of Heavy Negative Ions



Título del documento: Modified Ion-Acoustic Shock Waves and Double Layers in a Degenerate Electron-Positron-Ion Plasma in Presence of Heavy Negative Ions
Revista: Brazilian journal of physics
Base de datos: PERIÓDICA
Número de sistema: 000398959
ISSN: 0103-9733
Autores: 1
1
1
Instituciones: 1Jahangirnagar University, Department of Physics, Daca. Bangladesh
Año:
Periodo: Dic
Volumen: 44
Número: 6
Paginación: 703-710
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés A general theory for nonlinear propagation of one dimensional modified ion-acoustic waves in an unmagnetized electron-positron-ion (e-p-i) degenerate plasma is investigated. This plasma system is assumed to contain relativistic electron and positron fluids, non-degenerate viscous positive ions, and negatively charged static heavy ions. The modified Burgers and Gardner equations have been derived by employing the reductive perturbation method and analyzed in order to identify the basic features (polarity, width, speed, etc.) of shock and double layer (DL) structures. It is observed that the basic features of these shock and DL structures obtained from this analysis are significantly different from those obtained from the analysis of standard Gardner or Burgers equations. The implications of these results in space and interstellar compact objects (viz. nonrotating white dwarfs, neutron stars, etc.) are also briefly mentioned
Disciplinas: Física y astronomía
Palabras clave: Física de materia condensada,
Ondas acústicas de iones,
Plasmas,
Ondas de choque,
Iones negativos
Keyword: Physics and astronomy,
Condensed matter physics,
Ion acoustic waves,
Plasmas,
Shock waves,
Negative ions
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