Resonance nature of the magnetosphere

Exact theory for localized envelope modulated electrostatic wavepackets in space and dusty plasmas

“…Localized modulated wave packets, in particular, are encountered in abundance e.g. in the Earth's magnetosphere, where they are associated with localized field and/or density variations simultaneously observed (Pottelette et al, 1999;Alpert, 2001;Santolik, 2003). The occurrence of such wave forms is, for instance, thought to be related to the broadband electrostatic noise (BEN) encountered in the "auroral" region (Pottelette et al, 1999).…”

Nonlinear compressional electromagnetic ion-cyclotron wavepackets in space plasmas

“…Localized modulated wave packets are encountered in abundance during spacecraft observations (Cattell et al, 1998;McFadden et al, 1998;Stasiewicz et al, 2000;Chaston et al, 2002;Meziane et al, 2004a, b), and they are often associated with localized field and/or density variations simultaneously recorded (Pottelette et al, 1999;Alpert, 2001;Santolik, 2003). Our results may be of relevance to these observations.…”

Nonlinear electrostatic ion-acoustic "oscilliton" waves driven by charge non-neutrality effects

“…In geospace, by contrast, such coexisting wave modes were found much earlier. A vast volume of experimental geomagnetic micropulsation data exposes that the 0.4-2.2 Hz Pc1 HF modes superimpose upon the 1-250 mHz Pc2-5 LF ones (Alpert, 2001). In the last 10-20 years, many highresolution satellites have introduced various HF-LF wavefield diagnoses beyond the scope of these frequencies in different plasma regions, such as Freja Dovner et al, 1994;Pécseli et al, 1996), Polar (Cattell et al, , 1999, FAST (McFadden et al, 1998;Pottelette et al, 1999), Viking (Tjulin et al, 2003(Tjulin et al, , 2004, and Cluster (Santolik et al, 2003;Tjulin et al, 2003Tjulin et al, , 2004.…”

“…Usually, the fully developed linear MHD wave theory is prone to being used to account for the LF-HF excitations. As a matter of fact, linear MHD formulation does satisfactorily explain the geomagnetic pulsations created in the magnetosphere at frequencies of five branches Pc1-5 (see Alpert, 2001, and references therein for details): Pc1 is of the magnetospheric origin at the gyro-resonant IC frequency of magneto-active plasma ions, while others are of solar origin and transferred to the Earth's magnetosphere by the solar wind, driven by respective linear instabilities that are responsible for their generation. Table 1.…”