Solar Wind near the Sun Observed with Interplanetary Scintillation Using Three Microwave Frequencies.
Solar Wind near the Sun Observed with Interplanetary Scintillation Using Three Microwave Frequencies.
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使用三种微波频率通过行星际闪烁观测太阳附近的太阳风。
DOI：
10.5636/jgg.43.619
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Y. Koyama
中科院分区：
文献类型：
--
作者：
M. Tokumaru;H. Mori;Takashi Tanaka;T. Kondo;H. Takaba;Y. Koyama
利用大型天线系统在2 GHz、8 GHz和22 GHz进行了行星际闪烁观测，以研究太阳附近的太阳风。通过对IPS光谱理论模型的拟合估计的太阳风速表明，太阳风在10到30个太阳半径之间有明显的驱动。所得到的闪烁指数与太阳半径R-1.6的径向关系很好地吻合，并且在太阳风加速发生的区域附近也有轻微的增强。后一个事实表明，在加速区，等离子体的起伏增强。
The interplanetary scintillation observations with a large antenna system have been carried out at 2, 8 and 22GHz to investigate the solar wind near the sun. The solar wind velocities estimated by fitting the theoretical model for IPS spectra indicate that the solar wind is markedly driven at distances between 10 and 30 solar radii. The derived scintillation indices show a good agreement with a radial dependence of R-1.6 for >5 solar radii, and also display a slight enhancement around the region where the solar wind acceleration occurs. The latter fact implies that plasma fluctuations are enhanced in the acceleration region.