On the polarization of transversally small-scale MHD modes in the Earth’s magnetosphere

1Cheremnykh, SO
1Space Research Institute of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Kyiv, Ukraine
Kosm. nauka tehnol. 2013, 19 ;(4):57–64
Section: Space and Atmospheric Physics
Publication Language: Ukrainian

We present a theoretical analysis of polarization properties of transversally small-scale ultra-low-frequency MHD eigenmode perturbations in the dipolar magnetic field. A set of equations is derived describing Alfvén modes with intermediate polarization. In the toroidal and poloidal limits the set of equations reduces to previously derived sets. One of the obtained equations describes the ballooning instability.

Keywords: Alfvén modes, Earth’s magnetosphere, intermediate polarization
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