| タイトル | Magnetic field-aligned electric field acceleration and the characteristics of the optical aurora |
| 著者（英） | Sivjee, G. G.; Lyons, L. R.; Hecht, J. H.; Meier, R. R.; Christensen, A. B. |
| 著者所属（英） | Hulburt (E. O.) Center for Space Research|Aerospace Corp. |
| 発行日 | 1987-06-01 |
| 言語 | eng |
| 内容記述 | The long-recognized association of brighter aurora with more deeply penetrating, and hence more energetic, electrons is examined. Using the Knight (1973) relation between the magnetic-field-aligned current density and potential drop (derived from the theory of single-particle motion in the presence of a magnetic-field-aligned electric field), an approximate expression relating the energy flux of the precipitating electrons over discrete aurora and the mean particle energy is derived. This expression is used in conjunction with an auroral optical excitation and emission model to specify the dependence of the red/blue ratio of auroral optical emissions on the brightness of the aurora. It is shown that the quantitative predictions of the discrete auroral theory are in accord with observations of the aurora. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 87A43763 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/377058 |
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