Abstract
In the new investigation of dust-ion acoustic (DIA) waves with negative dust charges and weakly relativistic ions and electrons in the plasma, compressive and rarefactive DIA solitons of interesting characters are established through the Korteweg-de Vries (KdV) equation. Eventually, the amplitudes of the compressive DIA solitons are found to be constant at some critical temperature ratio αc (electron to ion temperature ratio) identifying some critical dust charge Zdc. It is predicted, that the reception of dust charges by the plasma particles at the variation of temperature starts functioning to the growth of compressive soliton’s constant stage of amplitude after the state of critical αc. The identification of critical dust charge (Zdc) which is found to be very great for solitons of constant amplitudes becomes feasible for very small dust to ion density ratio (σ). But it can be achieved, we observe, due to the relativistic increase in ion-density as in mass, which is also a salient feature of this investigation.
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Kalita, B.C., Das, S. Dust ion acoustic (DIA) solitary waves in plasmas with weak relativistic effects in electrons and ions. Astrophys Space Sci 352, 585–592 (2014). https://doi.org/10.1007/s10509-014-1954-3
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DOI: https://doi.org/10.1007/s10509-014-1954-3