Electron acoustic solitons in the Earth's magnetotail

Abstract

Abstract. Small amplitude electron -acoustic solitons are studied in a magnetized plasma consisting of two types of electrons, namely cold electron beam and background plasma electrons and two temperature ion plasma. The analysis predicts rarefactive solitons. The model may provide a possible explanation for the perpendicular polarization of the low-frequency component of the broadband electrostatic noise observed in the Earth's magnetotail.

Study of nonlinear ion- and electron-acoustic waves in multi-component space plasmas

“…The nonlinear ion-acoustic waves in multi-species plasmas have been studied by several workers (Buti, 1980;Hudson et al, 1983;Qian et al, 1988;Bharutram and Shukla, 1986;Berthomier et al, 1998;Reddy and Lakhina, 1991;Reddy et al, 1992). The electronacoustic waves in multi-species plasmas have been discussed by Watanabe and Tanuti (1977); Gary and Tokar (1985); Hellberg (1985, 2001); Ashour-Abdalla and Okuda (1986); Pottelette et al (1990); Dubouloz et al (1991Dubouloz et al ( , 1993; Berthomier et al (2000Berthomier et al ( , 2003; ; Tagare et al (2004);Cattaert et al (2005), Kakad et al (2007) and Lakhina et al (2008).…”

“…The negative potential ESWs have been interpreted in terms of ion solitary waves or solitons (Koskinen et al,904 G. S. Lakhina et al: Study of nonlinear ion-and electron-acoustic waves been commonly interpreted in terms of as Bernstein-GreeneKruskal (BGK) modes (Bernstein et al, 1957;Muschietti et al, 1999;Jovanovic and Shukla, 2000;Chen et al, 2005). Other favorite interpretations for these ESWs are based on the nonlinear evolution of a bump-on-tail instability/electron two stream instability (Omura et al, 1996;Kojima et al, 1997;Goldman et al, 1999), and electron-acoustic solitary waves (Pottelette et al, 1990;Dubouloz et al, 1991Dubouloz et al, , 1993Lakhina, 2001, 2004;Tagare et al, 2004. For a detailed discussion of various models, one can refer to Lakhina et al (2000Lakhina et al ( , 2004.…”

“…Viking) of solitary waves which had negative potentials (Pottelette et al, 1990;Dubouloz et al, 1991Dubouloz et al, , 1993Singh and Lakhina, 2004;Tagare et al, 2004). To explain the positive potential structures, Berthomier et al (2000) introduced an electron beam in the system having cold and hot electrons.…”

Time-fractional KdV equation for electron-acoustic waves in plasma of cold electron and two different temperature isothermal ions

“…Electron acoustic waves (EAWs) have been observed in the laboratory when the plasma consisted of two species of electrons with different temperatures, referred to as hot and cold electrons (Ikezawa and Nakamura 1981;Sahu 2010;Younsi and Tribeche 2010;Pakzad and Tribeche 2010), or in electron-ion plasma with ions hotter than electrons (Tagare et al 2004). Also its propagation plays an important role not only in laboratory but also in space plasma, see Pottelette S.A. El-Wakil · E.M. Abulwafa ( ) · E.K.…”

Obliquely propagating electron acoustic solitons in magnetized plasmas with nonextensive electrons

“…This clearly suggests that BEN is related to electron dynamics rather than to the ions (Matsumoto et al, 1994;Kakad et al, 2009). During the past decade, there has been a vast body of theoretical literature on electron-acoustic waves to explain the space observations of solitary waves with either negative (Tagare et al, 2004) or positive potentials (Mamuna et al, 2002a, b). demonstrated that the inclusion of the hot electron inertia can lead to compressive electron-acoustic solitons and may render the analysis much more intricate (Verheest et al, 2007).…”