Solar‐wind structure determined by corotating coronal inhomogeneities: 2. Arbitrary perturbations
Solar‐wind structure determined by corotating coronal inhomogeneities: 2. Arbitrary perturbations
复制标题
由corotting日冕不均匀性决定的太阳风结构：2.任意扰动
DOI：
10.1029/ja077i001p00035
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发表时间：
1972
期刊：
影响因子：
--
通讯作者：
L. Finley
中科院分区：
文献类型：
--
作者：
G. Siscoe;L. Finley
太阳风结构的问题，从长期生活在太阳日冕的不均匀性已被扩展的线性流体动力学方法的框架内，允许任意扰动的等离子体参数，即速度，密度和温度。通过使用帕克模型的零阶流速，解决方案施加在零阶临界点的扰动。利用解在临界点处必须正则的限制，可以将所有情况表示为临界点处纯速度、密度和温度扰动的解的线性和。三个内边界条件的积分结果可以作为矩阵的元素，将一个日心距离处的任意扰动映射到任何其他距离。解的一个有趣的特点是，在地球上的振幅为纯初始温度的情况下比其他两种情况下大。因此，如果在临界点的扰动幅度都是相同的数量级，温度扰动将主导地球上的结构。事实上，由纯初始温度情况给出的地球扰动之间的相位与观测结果相似。
The problem of the solar-wind structure resulting from long-lived inhomogeneities in the solar corona has been extended within the framework of a linearized hydrodynamic approach to allow for arbitrary perturbations in the plasma parameters, namely, velocity, density, and temperature. By using a Parker model for the zero-order flow speed, solutions are given for perturbations imposed at the zero-order critical point. Using the restriction that the solutions must be regular at the critical point, it is possible to express all situations as a linear sum of the solutions for pure velocity, density, and temperature perturbations at the critical point. The results of the integrations for the three inner-boundary conditions can be used as the elements of matrices that map arbitrary perturbations at one heliocentric distance to any other distance. One interesting feature of the solutions is that the amplitudes at earth for the pure initial temperature situation are larger than for the other two situations. Thus, if the perturbation amplitudes at the critical point are all of the same order of magnitude, the temperature perturbation will dominate the structure at earth. In fact, the phases between the perturbations at earth given by the pure initial temperature situation are similar to the observations.