On the structure of azimuthally small-scale ULF oscillations of hot space plasma in a curved magnetic field. Modes with continuous spectrum |
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| Authors: | O K Cheremnykh D Yu Klimushkin D V Kostarev |
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| Institution: | 1. Space Research Institute, National Academy of Sciences of Ukraine, pr. Akademika Glushkova 40, Kyiv, 03680, Ukraine
2. Institute of Solar-Terrestrial Physics, ul. Lenina 126-a, Irkutsk, 664033, Russia
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| Abstract: | The problem of propagation of azimuthally small-scale ULF modes in plasma with 1D inhomogeneity and variable curvature of magnetic lines of force is analyzed. The propagation regions and the transverse structure of stable Alfven and cusp modes, as well as unstable ballooning modes, are determined. It is shown that long-living ballooning and cusp modes can exist. Our results qualitatively describe the behavior of ULF modes with continuous spectrum in the geomagnetosphere and can be used for interpretation of spacecraft and SuperDARN radar measurement data. |
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