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The investigation of Electron-Positron-Ion (EPI) plasma?--?a fully ionised gas of electrons and positrons that includes astrophysical plasmas like solar winds?--?has attracted a great deal of attention over the last twenty years. A new study published in
EPJ D by Garston Tiofack, Faculty of Sciences, University of Marousa, Cameroon, and colleagues, assesses the dynamics of positron acoustic waves (PAWS) in EPI plasmas whilst under the influence of magnetic fields, or magnetoplasmas.
The authors studied the changes in PAWs using a framework of Korteweg-de Vries (KdV) and modified Korteweg-de Vries (mKdV) equations finding a former led to compressive positron acoustic solitary waves (PASWs), whilst the latter resulted in the same and additional rarefactive PASWs. Mathematical models and numerical simulations performed by the researchers also allowed them to consider the effect of various other factors on the magnetoplasma including the concentration of hot electrons to that of positrons and applied nonthermal parameters.