Study of Nonlinear Waves in Astrophysical Quantum Plasmas



Título del documento: Study of Nonlinear Waves in Astrophysical Quantum Plasmas
Revista: Brazilian journal of physics
Base de datos: PERIÓDICA
Número de sistema: 000390398
ISSN: 0103-9733
Autores: 1
1
Instituciones: 1Jahangirnagar University, Department of Physics, Savar, Dhaka. Bangladesh
Año:
Periodo: Abr
Volumen: 45
Número: 2
Paginación: 200-205
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, analítico
Resumen en inglés The nonlinear propagation of the electronacoustic solitary waves (EASWs) in an unmagnetized, collisionless degenerate quantum plasma system has been investigated theoretically. Our considered model consisting of two distinct groups of electrons (one of inertial non-relativistic cold electrons and other of inertialess ultrarelativistic hot electrons) and positively charged static ions. The Korteweg-de Vries (K-dV) equation has been derived by employing the reductive perturbation method and numerically examined to identify the basic features (speed, amplitude, width, etc.) of EASWs. It is shown that only rarefactive solitary waves can propagate in such a quantum plasma system. It is found that the effect of degenerate pressure and number density of hot and cold electron fluids, and positively charged static ions, significantly modify the basic features of EASWs. It is also noted that the inertial cold electron fluid is the source of dispersion for EA waves and is responsible for the formation of solitary structures. The applications of this investigation in astrophysical compact objects (viz. non-rotating white dwarfs, neutron stars, etc.) are briefly discussed
Disciplinas: Física y astronomía
Palabras clave: Física de materia condensada,
Plasma astrofísico,
Ondas solitarias,
Efecto relativista
Keyword: Physics and astronomy,
Condensed matter physics,
Astrophysical plasma,
Solitary waves,
Relativistic effect
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