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Figure Captions
Figure 1.
(a) The soliton amplitude ' 0 is depicted against the propagation speed ; for i = 1=300;
= 0:4 (solid curve), = 0:9 (dashed curve), and i = 1=3 and = 0:4 (dotted curve). (b)
The soliton width W is depicted against for = 0:1 (solid curve), = 0:5 (dashed curve)
and = 0:99 (dotted curve). Here we have used U 0 = 0:1.
Figure 2.
The electrostatic potential ' (1) is depicted against the radial and angular coordinates,
r and ;respectively: (a) compressive solitary pulse for = 1 and (b)
rarefactive solitary pulse for = 2. The other plasma parameters are i = 1=300;
= 0:4; U 0 = 0:1 and t = 1:
Figure 3.
(a) The nonlinear coe¢ cient A, (b) the determinant , and (c) the nonlinear coe¢ cient
C are depicted against the propagation speed ; for i = 1=3 (solid curve), i = 1=300
(dashed curve), where = 0:1.
Figure 4.
(a) The nonlinear coe¢ cient A, (b) the determinant , and (c) the nonlinear coe¢ cient
C are depicted against the propagation speed ; for i = 1=3 (solid curve), i = 1=4 (dashed
curve), where = 0:5.
Figure 5.
(a) The nonlinear coe¢ cient A, (b) the determinant , and (c) the nonlinear coe¢ cient
C are depicted against the propagation speed ; for i = 1=3 (solid curve), i = 1=300
(dashed curve), where = 0:9.
Figure 6.
The Sagdeev potential V (' (1) ) is depicted against the electrostatic potential ' (1) , for (a)
i = 1=3; = 0:1, = 2:35 (solid curve), = 2:4 (dashed curve), (b) i = 1=3; = 2:35;
= 0:1 (solid curve), = 0:11 (dashed curve), (c) = 0:5, = 3:5; i = 1=3 (solid curve)
and i = 1=4 (dashed curve).
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