The galactic distribution of free electrons

The galactic distribution of free electrons
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DOI:
10.1038/354121a0
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发表时间:
1991-11
期刊:
影响因子:
64.8
通讯作者:
J. Cordes;J. Weisberg;D. Frail;S. R. Spangler;Michael J. Ryan
J. Cordes;J. Weisberg;D. Frail;S. R. Spangler;Michael J. Ryan
中科院分区:
综合性期刊1区
文献类型:
--
作者:
J. Cordes;J. Weisberg;D. Frail;S. R. Spangler;Michael J. Ryan

文献摘要

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脉冲星和其他射电源的色散、距离和散射测量现在已经足够多,可以对整个星系的自由电子分布进行建模。一个局部电子密度的双分量轴对称模型,适用于从100公里到几个秒差距的所有尺度,解释了大部分数据;稠密的、离散的云群也是需要的,并且有一些证据表明存在螺旋结构。
Dispersion, distance and scattering measurements of pulsars and other radio sources are now sufficiently numerous to allow modelling of the entire galactic distribution of free electrons. A two-component axisymmetric model of local electron density, fitted on all scales from 100 km to a few parsecs, accounts for most of the data; a population of dense, discrete clouds is also needed, and there is some evidence for spiral structure.