| タイトル | Ion anisotropy instabilities in the magnetosheath |
| 著者（英） | Gary, S. P.; Anderson, Brian J.; Fuselier, Stephen A. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1993-02-01 |
| 言語 | eng |
| 内容記述 | Recent observations in Earth's magnetosheath have delineated several different kinds of magnetic fluctuation spectra below the proton cyclotron frequency. This paper provides a theoretical interpretation for some of these observations describing solutions of the linear Vlasov dispersion equation for fully electromagnetic instabilities for particle distributions which model those observed in the magnetosheath. This model yields three growing modes: the proton cyclotron anisotropy the helium cyclotron anisotropy, and the mirror instabilities. The results show very good agreement with the observations of mirror-like and proton-cyclotron-like events. This agreement with observations implies that the transition between cyclotron and mirror fluctuation dominance is consistent with linear theory. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 93A24596 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/320368 |
