Thermal Models for Solar Hard X-ray Bursts
Thermal Models for Solar Hard X-ray Bursts
复制标题
太阳硬 X 射线爆发的热模型
DOI：
10.1086/158078
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
L. Auer
中科院分区：
文献类型：
--
作者：
D. Smith;L. Auer
研究了由中心电子被加热到约4亿K的一维通量管组成的硬x射线爆发的热模型。发现热x射线源的演化是电子-离子热耦合和源膨胀成的等离子体状态的敏感函数。当这种耦合较弱时，被加热的电子分离成一个约4亿K的高温区域和一个约1亿K的低温区域，这一过程导致幂律x射线谱。在强耦合的情况下，只有一个主导温度，大约2亿K， x射线光谱类似于真正的热光谱。
Thermal models for hard X-ray bursts consisting of a one-dimensional flux tube whose central electrons are heated to about 400 million K are examined. It is found that the evolution of a thermal X-ray source is a sensitive function of the electron-ion thermal coupling and the state of the plasma into which the source expands. When this coupling is weak, the heated electrons separate into a region of high temperature of about 400 million K and a region of lower temperature of about 100 million K, a process which leads to a power-law X-ray spectrum. In the case of strong coupling there is only one dominant temperature, about 200 million K, and the X-ray spectrum resembles a true thermal spectrum.