Nonplanar Positron-Acoustic Shock Waves in Astrophysical Plasmas
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| Format: | Artículo científico |
| Sprache: | en |
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Sociedade Brasileira de Física
2015
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| author | M. G. Shah |
| author_facet | M. G. Shah |
| contents | Nonplanar Positron-Acoustic Shock Waves in Astrophysical Plasmas M. G. Shah M. R. Hossen A. A. Mamun Física, Astronomía y Matemáticas Positron Positron Shock waves Shock waves acoustic waves The problem of nonlinear positron-acoustic shock waves (PASWs) in an unmagnetized, collision- less, dense plasma system (containing non-relativistic cold positrons, both non-relativistic and ultra-relativistic degen- erate electron and hot positron fluids and positively charged static ions) is addressed. The combined effects of the non- relativistic and ultra-relativistic degenerate electron and hot positron fluids are organized in the study of the PASWs. By using the reductive perturbation method, modified Burgers equation is derived and numerically analyzed. For the non- relativistic limits in like manner for the ultra-relativistic lim- its, it is seen that the shock wave characteristics are modified significantly. The effects of kinematic viscosity, degenerate pressure, nonplanar geometries, and plasma particle number densities on the properties of PASWs are numerically ana- lyzed. As time goes, PASWs propagating in cylindrical and spherical geometry are deformed. The fundamental features and the underlying physics of PASWs, which are concerned to some astrophysical compact objects (viz. neutron stars, white dwarfs, etc.), are concisely mentioned. 2015 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46438835005 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2 Vol.45 |
| format | Artículo científico |
| id | redalyc_46438835005 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Nonplanar Positron-Acoustic Shock Waves in Astrophysical Plasmas M. G. Shah Física, Astronomía y Matemáticas Positron Positron Shock waves Shock waves acoustic waves Nonplanar Positron-Acoustic Shock Waves in Astrophysical Plasmas M. G. Shah M. R. Hossen A. A. Mamun Física, Astronomía y Matemáticas Positron Positron Shock waves Shock waves acoustic waves The problem of nonlinear positron-acoustic shock waves (PASWs) in an unmagnetized, collision- less, dense plasma system (containing non-relativistic cold positrons, both non-relativistic and ultra-relativistic degen- erate electron and hot positron fluids and positively charged static ions) is addressed. The combined effects of the non- relativistic and ultra-relativistic degenerate electron and hot positron fluids are organized in the study of the PASWs. By using the reductive perturbation method, modified Burgers equation is derived and numerically analyzed. For the non- relativistic limits in like manner for the ultra-relativistic lim- its, it is seen that the shock wave characteristics are modified significantly. The effects of kinematic viscosity, degenerate pressure, nonplanar geometries, and plasma particle number densities on the properties of PASWs are numerically ana- lyzed. As time goes, PASWs propagating in cylindrical and spherical geometry are deformed. The fundamental features and the underlying physics of PASWs, which are concerned to some astrophysical compact objects (viz. neutron stars, white dwarfs, etc.), are concisely mentioned. 2015 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46438835005 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2 Vol.45 |
| title | Nonplanar Positron-Acoustic Shock Waves in Astrophysical Plasmas |
| topic | Física, Astronomía y Matemáticas Positron Positron Shock waves Shock waves acoustic waves |
| url | https://www.redalyc.org/articulo.oa?id=46438835005 |