Scaling Laws for a Nanoflare-Heated Solar Corona
Scaling Laws for a Nanoflare-Heated Solar Corona
复制标题
纳耀斑加热日冕的缩放定律
DOI：
10.1086/309480
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Katsukawa
中科院分区：
文献类型：
--
作者：
G. Vekstein;Y. Katsukawa
太阳日冕被加热的概念，被称为“nanoflares”的许多小耀斑事件。热日冕被看作是一个由随机分布的脉冲加热事件在日冕磁场中产生的高温元素磁丝的集合。结果表明，这种方法使我们能够预测各种签名的X射线日冕循环，而不指定的加热过程的细节。特别是，温度，填充因子，和发射措施上的环的长度和强度的日冕磁场的依赖性。所得的标度律与观测数据吻合较好。
The concept that the solar corona is heated by numerous small flarelike events dubbed "nanoflares" is considered. The hot corona is viewed as an ensemble of high-temperature elemental magnetic filaments created within the coronal magnetic field by randomly distributed impulsive heating events. It is shown that such an approach allows us to predict various signatures of X-ray coronal loops without specifying the details of the heating process. In particular, the dependence of the temperature, filling factor, and emission measure on the length of the loop and strength of the coronal magnetic field is derived. The obtained scaling laws fit reasonably with observational data.