| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000390398 |
| ISSN: | 0103-9733 |
| Authors: | Hossen, M.R1 Mamun, A.A1 |
| Institutions: | 1Jahangirnagar University, Department of Physics, Savar, Dhaka. Bangladesh |
| Year: | 2015 |
| Season: | Abr |
| Volumen: | 45 |
| Number: | 2 |
| Pages: | 200-205 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | 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 |
| Disciplines: | Física y astronomía |
| Keyword: | Física de materia condensada, Plasma astrofísico, Ondas solitarias, Efecto relativista |
| Keyword: | Physics and astronomy, Condensed matter physics, Astrophysical plasma, Solitary waves, Relativistic effect |
| Full text: | Texto completo (Ver PDF) |
