| タイトル | Ionic charge states of solar energetic particles - Effects of flare X-rays |
| 著者（英） | Mullan, D. J.; Waldron, W. L. |
| 著者所属（英） | Franklin Inst. |
| 発行日 | 1986-09-01 |
| 言語 | eng |
| 内容記述 | Ionic charge states of solar energetic particles (SEP) from three flares have been reported by Luhn et al. (1984). Interpretations of the mean charges in terms of a source temperature Ts (assuming collisional ionization equilibrium) yield inconsistent results. For Mg, the required Ts (up to 8 x 10 to the 6th K) are larger than for N and Si by factors of up to 5. Here it is pointed out that flare X-rays photoionize the ambient corona, causing apparent ionization temperatures there to exceed the local electron temperature, Te. Using realistic flare X-ray fluxes, it is shown that the charge data for six elements (C, N, Ne, Mg, Si, and S) can be fitted if the source is at coronal temperatures (Te = 1-2 x 10 to the 6th K), but the ionization equilibrium is radiation dominated. For oxygen, a slight inconsistency persists in the three flares. |
| NASA分類 | SOLAR PHYSICS |
| レポートNO | 87A16650 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/381087 |
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