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dc.contributor.authorAdnan, Muhammadpt_BR
dc.contributor.authorMahmood, Shahzadpt_BR
dc.contributor.authorQamar, Anisapt_BR
dc.date.accessioned2016-06-09T02:08:24Zpt_BR
dc.date.issued2014pt_BR
dc.identifier.issn1070-664Xpt_BR
dc.identifier.urihttp://hdl.handle.net/10183/142379pt_BR
dc.description.abstractLinear and nonlinear coupled drift-ion acoustic waves are investigated in a nonuniform magnetoplasma having kappa distributed electrons and positrons. In the linear regime, the role of kappa distribution and positron content on the dispersion relation has been highlighted; it is found that strong superthermality (low value of j) and addition of positrons lowers the phase velocity via decreasing the fundamental scalelengths of the plasmas. In the nonlinear regime, first, coherent nonlinear structure in the form of dipoles and monopoles are obtained and the boundary conditions (boundedness) in the context of superthermality and positron concentrations are discussed. Second, in case of scalar nonlinearity, a Korteweg–de Vries-type equation is obtained, which admit solitary wave solution. It is found that both compressive and rarefactive solitons are formed in the present model. The present work may be useful to understand the low frequency electrostatic modes in inhomogeneous electron positron ion plasmas, which exist in astrophysical plasma situations such as those found in the pulsar magnetosphere.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofPhysics of plasmas. Melville. Vol. 21, no. 9 (Sept. 2014), 092119, 8 p.pt_BR
dc.rightsOpen Accessen
dc.subjectPlasmas astrofisicospt_BR
dc.subjectSólitons em plasmaspt_BR
dc.subjectRelações de dispersãopt_BR
dc.subjectOndas de deriva em plasmaspt_BR
dc.subjectOndas íon-acústicas em plasmaspt_BR
dc.titleCoupled ion acoustic and drift waves in magnetized superthermal electron-positron-ion plasmaspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000943751pt_BR
dc.type.originEstrangeiropt_BR


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