Temperature dependence of the abundances of elements in solar He-3 rich events
Temperature dependence of the abundances of elements in solar He-3 rich events
复制标题
太阳 He-3 富集事件中元素丰度的温度依赖性
DOI：
10.1086/185109
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
D. Reames
中科院分区：
文献类型：
--
作者：
D. Reames
观测到太阳富氦事件中的元素丰度随母耀斑的软X射线温度而变化。这些观察结果与元素在(10-15)×10到6K的耀斑加热等离子体中预期的平衡电荷态的热碰撞电离是一致的。离子的快速电离需要在电晕中发生足够低的加热，使电子密度超过约(1-5)×10到8/立方厘米。重元素增强可能是在事件的闪光阶段处理的物质的特征，而不是被日冕激波加速的未加热的环境物质。参考文献18篇。
The element abundances in solar He-3-rich events are observed to vary with the soft X-ray temperature of the parent flare. The observations are consistent with thermal collisional ionization of the elements to the equilibrium-charge states expected within the flare-heated plasma at (10-15) x 10 to the 6th K. Proposed photoionization mechanisms appear to be excluded. Rapid ionization of the ions requires that the heating occur sufficiently low in the corona that the electron density exceed about (1-5) x 10 to the 8th/cu cm. Heavy-element enhancements might be a signature of material processed in the flash phase of events in contrast to unheated ambient material accelerated by a coronal shock. 18 references.