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Cylindrical electron-acoustic solitary waves with hybrid Cairns-Tsallis distributed hot electrons
(Punjab Agricultural University, Ludhiana, 2019) Harmanpreet Kaur; Parveen Bala
The propagation of cylindrical electron acoustic solitary waves in a plasma system constituting cold electron fluid, immobile ions and hot electrons has been studied. The hot electrons are assumed to follow hybrid nonthermal-nonextensive distribution popularly known as Cairns-Tsallis distribution. This distribution is applicable within the parameters range 0.6  q 1 and 0    0.25. Using Reductive preturbation method Korteweg de- Vries (KdV) is derived to obtain the required solution for cylindrical electron acoustic solitary waves. Our present investigation focuses on revealing the dependency of the behavior of these waves on nonthermal parameter ( ) , hot-to-cold electron density ratio ( ) and nonextensive parameter ( q ). Only negative potential structures are reported in our plasma model. The effect of nonextensivity (q), nonthermality ( ) and cylindrical geometry on the amplitudes and width of electron acoustic potential structures have been studied numerically. The numerical results are presented in the form of graphs in given parametric ranges. The present plasma model may be helpful in simulating the electron acoustic solitary behavior in the auroral regions and magnetospheric plasmas of earth.