Electrostatic Solitary Structures in a Relativistic Degenerate Multispecies Plasma



Título del documento: Electrostatic Solitary Structures in a Relativistic Degenerate Multispecies Plasma
Revista: Brazilian journal of physics
Base de datos: PERIÓDICA
Número de sistema: 000398955
ISSN: 0103-9733
Autores: 1
1
Instituciones: 1Jahangirnagar University, Department of Physics, Daca. Bangladesh
Año:
Periodo: Dic
Volumen: 44
Número: 6
Paginación: 673-681
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés The nonlinear propagation of cylindrical and spherical modified ion-acoustic (mIA) waves in an unmagnetized, collisionless, relativistic, degenerate multispecies plasma has been investigated theoretically. This plasma system is assumed to contain both relativistic degenerate electron and positron fluids, nonrelativistic degenerate positive and negative ions, and positively charged static heavy ions. The restoring force is provided by the degenerate pressures of the electrons and positrons, whereas the inertia is provided by the mass of positive and negative ions. The positively charged static heavy ions participate only in maintaining the quasi-neutrality condition at equilibrium. The nonplanar K-dV and mK-dV equations are derived by using reductive perturbation technique and numerically analyzed to identify the basic features (speed, amplitude, width, etc.) of mIA solitary structures. The basic characteristics of mIA solitary waves are found to be significantly modified by the effects of degenerate pressures of electron, positron, and ion fluids, their number densities, and various charge states of heavy ions. The implications of our results to dense plasmas in astrophysical compact objects (e.g., nonrotating white dwarfs, neutron stars, etc.) are briefly mentioned
Disciplinas: Física y astronomía
Palabras clave: Física de materia condensada,
Plasmas,
Ondas acústicas de iones,
Ondas solitarias
Keyword: Physics and astronomy,
Condensed matter physics,
Plasmas,
Ion acoustic waves,
Solitary waves
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