Evaluation of a space-observed electric field structure for the ability to destabilize inhomogeneous energy-density-driven waves
| Autor: | Mihail Melnik, Igor V. Mingalev, Boris Kozelov, Andris Lubchich, Irina Golovchanskaya, Igor Mingalev |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Atmospheric Science business.industry lcsh:QC801-809 Geology Astronomy and Astrophysics lcsh:QC1-999 Computational physics Ion Wavelength Transverse plane lcsh:Geophysics. Cosmic physics Optics Space and Planetary Science Electric field Dispersion relation Physics::Space Physics Earth and Planetary Sciences (miscellaneous) Perpendicular lcsh:Q Ionosphere business lcsh:Science Quasistatic process lcsh:Physics |
| Zdroj: | Annales Geophysicae, Vol 32, Pp 1-6 (2014) |
| ISSN: | 1432-0576 0992-7689 |
| Popis: | We examine the effectiveness of nonuniform, quasistatic, transverse electric fields that are often observed in the auroral region in destabilization of inhomogeneous energy-density-driven (IEDD) waves. Specifically, the IEDD dispersion relation of Ganguli et al. (1985a, b) is evaluated for an electric field structure observed by the FAST satellite in the auroral ionosphere at 1000 km altitude. The background field-aligned current, plasma density and ion composition are derived from FAST observations. Other input parameters adopted in the calculations are varied in pertinent ranges. Unstable solutions are obtained that indicate a variety of frequencies and perpendicular wavelengths. These can manifest as a broadband spectrum of IEDD waves. |
| Databáze: | OpenAIRE |
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