What geometrical factors determine the in situ solar wind speed?
What geometrical factors determine the in situ solar wind speed?
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DOI：
10.1007/s11434-011-4965-2
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发表时间：
2011-12
影响因子：
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通讯作者：
Bo Li;Yao Chen;L. Xia
中科院分区：
文献类型：
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作者：
Bo Li;Yao Chen;L. Xia
目前，还需要解决为什么快的太阳风快，慢的太阳风慢。最近我们已经证明，磁力线曲率可能对风速ν有很大的影响，从而为Arge等人的发现提供了一种解释，即ν不仅仅取决于流管膨胀系数。这里我们通过大量的数值例子表明，ν和场线曲率之间的相关性对相当一般的基边界条件和相当一般的加热函数是有效的。此外，场线曲率的影响是更明显的质子α粒子的速度差时，检查。我们建议，任何太阳风模型必须考虑到任何定量分析的场线形状。
At present it remains to address why the fast solar wind is fast and the slow wind is slow. Recently we have shown that the field line curvature may substantially influence the wind speedν, thereby offering an explanation for the Arge et al. finding thatνdepends on more than just the flow tube expansion factor. Here we show by extensive numerical examples that the correlation betweenνand field line curvature is valid for rather general base boundary conditions and for rather general heating functions. Furthermore, the effect of field line curvature is even more pronounced when the proton-alpha particle speed difference is examined. We suggest that any solar wind model has to take into account the field line shape for any quantitative analysis to be made.