eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences June 2020 32 6 36 46 http://dx.doi.org/10.22147/jusps-B/320601 1519 article Relativistic Effect of Electrons on Dust Acoustic Solitary waves in unmagnetized plasma RIJU KUMAR 1 Department of Mathematics, Pandu College, Guwahati-781012, Assam (India) <p>In this paper, we study dust acoustic solitary waves (DASW) based on the dust charge</p> <p style="text-align:justify">Z<sub>d&nbsp;</sub>=equilibrium density of ions / equilibrium density of dust ions , initial dust speed do U<sub>do</sub> and initial streaming speed<br /> <img alt="\nu" src="http://latex.codecogs.com/gif.latex?%5Cnu" /><sub>eo</sub> &nbsp;of electrons with the introduction of relativistic effect. Only rarefactive solitons are found to exist in the<br /> unmagnetized dusty plasma in presence of relativity for electrons. It is observed that for greater values of dust<br /> charge&nbsp; Z<sub>d</sub> rarefactive solitons exist.</p> https://ultraphysicalsciences.org/paper/1519/ Dust acoustic wave Dusty plasma Soliton