Abstract
Linear and nonlinear Alfvén waves in an electron–positron–ion plasma are studied in the presence of a background current gradient. The temporal and spatial scales of this electromagnetic perturbation in electron–positron plasma become very different if the ion concentration is about 0.1 % or more. The instability criterion becomes dependent upon the concentration of different species in a three component plasma, which is a different result compared to previous studies for two component plasmas. A comparison of this study with the limiting cases of electron–ion and electron–positron plasmas is also presented. This investigation can be applicable to astrophysical plasmas like active galactic nuclei (AGN) and the magnetospheres of pulsars.
Published Version
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