Extremely long baseline interplanetary scintillation measurements of solar wind velocity
Extremely long baseline interplanetary scintillation measurements of solar wind velocity
复制标题
太阳风速度的极长基线行星际闪烁测量
DOI：
10.1029/2005ja011485
复制
发表时间：
2006
影响因子：
--
通讯作者：
R. Jones
中科院分区：
文献类型：
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作者：
A. Breen;R. Fallows;M. Bisi;P. Thomasson;C. Jordan;G. Wannberg;R. Jones
[1]我们目前的观测结果的行星际闪烁（IPS）使用望远镜的MERLIN和EISCAT网络中的光束分离接近2000公里，远大于在任何以前的IPS实验。闪烁模式之间的显着相关性，观察到的时间滞后达8秒，快速和缓慢的太阳风流非常清楚地解决。一次观测显示了两种离散的快速太阳风模式的明确证据，我们解释为起源于北方极冕洞的皇冠和极洞向赤道的延伸。我们认为，这种类型的实验将提供一个新的和重要的信息来源的时间和空间变化的小尺度湍流的太阳风。从极长基线测量中获得的速度分辨率的提高还提供了关于行星际空间太阳风大尺度速度结构发展的新信息。
[1] We present results of observations of interplanetary scintillation (IPS) made using the telescopes of the MERLIN and EISCAT networks in which the beam separation approached 2000 km, much larger than in any previous IPS experiments. Significant correlation between the scintillation patterns was observed at time lags of up to 8 s and fast and slow streams of solar wind were very clearly resolved. One observation showed clear evidence of two discrete modes of fast solar wind, which we interpret as originating in the crown of the northern polar coronal hole and in an equatorward extension of the polar hole. We suggest that experiments of this type will provide a new and important source of information on the temporal and spatial variation of small-scale turbulence in the solar wind. The improved velocity resolution available from extremely long baseline measurements also provides new information on the development of the large-scale velocity structure of the solar wind in interplanetary space.