| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000382325 |
| ISSN: | 0103-9733 |
| Authors: | Rahman, M.M1 Alam, M.S1 Mamun, A.A1 |
| Institutions: | 1Jahangirnagar University, Department of Physics, Savar, Dhaka. Bangladesh |
| Year: | 2015 |
| Season: | Jun |
| Volumen: | 45 |
| Number: | 3 |
| Pages: | 314-320 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | The nonlinear propagation of cylindrical and spherical positron-acoustic shock waves (PASWs) in an unmagnetized four-component plasma (containing nonthermal distributed hot positrons and electrons, cold mobile viscous positron fluid, and immobile positive ions) is investigated theoretically. The modified Burgers equation is derived by employing the reductive perturbation method. Analytically, the effects of cylindrical and spherical geometries, nonthermality of electrons and hot positrons, relative number density and temperature ratios, and cold mobile positron kinematic viscosity on the basic features (viz. polarity, amplitude, width, phase speed, etc.) of PASWs are briefly addressed. It is examined that the PASWs in nonplanar (cylindrical and spherical) geometry significantly differ from those in planar geometry. The relevance of our results may be useful in understanding the basic characteristics of PASWs in astrophysical and laboratory plasmas |
| Disciplines: | Física y astronomía |
| Keyword: | Teoría cinética y plasmas, Positrones, Ondas de choque acústico, Plasma de electrón-positrón, Ecuación modificada de Burgers |
| Keyword: | Physics and astronomy, Kinetic theory and plasma, Positrons, Acoustic shock waves, Electron-positron plasma, Modified Burgers equation |
| Full text: | Texto completo (Ver HTML) |
