| タイトル | High-resolution X-ray spectra of solar flares. VI - Impulsive soft X-ray flares |
| 著者（英） | Kreplin, R. W.; Doschek, G. A.; Feldman, U. |
| 著者所属（英） | Hulburt (E. O.) Center for Space Research |
| 発行日 | 1982-09-15 |
| 言語 | eng |
| 内容記述 | Doschek et al. (1980) and Feldman et al. (1980) have discussed high-resolution soft X-ray spectra of solar flares. The present investigation is concerned with the characteristics of the impulsive events as observed in soft X rays and the cooling of the flare plasma in terms of energy loss processes. A class of intense, short-lived solar flares which appear to be characterized by very high densities at high temperatures is found. For the 1979 November 6 event, the cooling time is so rapid that the density obtained may be a lower limit. The main cooling mechanism for the flares is found to be radiative. Two of the events are associated with strong gamma-ray emission and both of these events are very unusual in their soft X-ray emission. The 1979 November 9 flare shows extremely broad X-ray emission lines during the rise phase, indicative of nonthermal velocities of the order of 300 km/s. |
| NASA分類 | SOLAR PHYSICS |
| レポートNO | 82A44624 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/409034 |
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