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Formation of density cavities with a nonstationary electric field in the zone of auroral field-aligned currents

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Abstract

The formation of small-scale density cavities with a nonstationary electric field, which are registered in the Earth’s auroral magnetosphere, has been analyzed. It has been indicated that cavities are probably initially caused by quasi-static field-aligned electric currents and currents of kinetic Alfvén waves exceeding threshold values. Urgent variants of the linear and nonlinear stages of density disturbance instabilities have been considered. The determined properties of the parameters of small-scale density cavities and nonstationary electric fields are in agreement with the known experimental data.

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Authors and Affiliations

  1. Institute of Applied Physics, Russian Academy of Sciences, ul. Ul’yanova 46, Nizhni Novgorod, 603600, Russia

    P. A. Bespalov

  2. Alekseev State Technical University, ul. Lenina 22, Nizhni Novgorod, 603600, Russia

    V. G. Misonova

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  1. P. A. Bespalov
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  2. V. G. Misonova
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Original Russian Text © P.A. Bespalov, V.G. Misonova, 2011, published in Geomagnetizm i Aeronomiya, 2011, Vol. 51, No. 4, pp. 489–497.

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Bespalov, P.A., Misonova, V.G. Formation of density cavities with a nonstationary electric field in the zone of auroral field-aligned currents. Geomagn. Aeron. 51, 483–491 (2011). https://doi.org/10.1134/S0016793211040098

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  • DOI: https://doi.org/10.1134/S0016793211040098

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