Paramagnetic alignment of thermally rotating dust
Paramagnetic alignment of thermally rotating dust
复制标题
热旋转灰尘的顺磁排列
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
Alex Lazarian
中科院分区：
文献类型：
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作者：
Alex Lazarian
针对颗粒与气体温度的有限比率，分析研究了热旋转扁圆尘埃颗粒的顺磁排列。对于这样的比率，角动量 J 相对于最大惯性颗粒轴的对准只是部分的。我们使用微扰方法处理J的排列问题，并将J在晶粒体轴上的排列问题与J在磁场中的排列问题分开。这使我们能够找到晶粒轴与磁场的对齐情况，从而将我们的理论与偏振观测联系起来。我们目前的结果适用于顺磁性和超顺磁性颗粒的排列。
The paramagnetic alignment of thermally rotating oblate dust grains is studied analytically for finite ratios of grain to gas temperatures. For such ratios, the alignment of angular momentum J with respect to the grain axis of maximal inertia is only partial. We treat the alignment of J using perturbative· methods and disentangle the problem of J alignment in grain body axes from that of J alignment with respect to magnetic field. This enables us to find the alignment of grain axes to magnetic field and thus relate our theory to polarimetric observations. Our present results are applicable to the alignment of both paramagnetic and superparamagnetic grains.