Radio spectral ageing in a random magnetic field
Radio spectral ageing in a random magnetic field
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随机磁场中的无线电频谱老化
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
P. C. Tribble
中科院分区：
文献类型：
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作者：
P. C. Tribble
我研究随机磁场中相对论电子的射电同步辐射的老化。有一个对应于场强范围的突变频率范围，因此Jaffe-Perola模型给出的谱中的突变并不总是可见的，并且谱可以非常类似于Kardashev-Pacholczyk模型。这解释了Kardashev-Pacholczyk模型与观测结果的良好拟合，尽管Jaffe-Perola模型在物理上更合理。频谱中没有指数突变并不意味着不发生俯仰角散射。在存在逆康普顿损耗的情况下，谱形状强烈依赖于均方根场强，允许检查均分估计
I study the ageing of radio synchrotron emission from relativistic electrons in a random magnetic field. There is a range of break frequencies corresponding to the range in field strength, so that the sharp break in the spectrum given by the Jaffe-Perola model is not always seen, and the spectra can be very similar to that of the Kardashev-Pacholczyk model. This explains the good fit of the Kardashev-Pacholczyk model to observations, even though the Jaffe-Perola model is more physically reasonable. The lack of an exponential break in the spectrum does not mean that pitch angle scattering does not occur. In the presence of inverse Compton losses, the spectral shape is strongly dependent on rms field strength, allowing equipartition estimates to be checked