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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >North-south flows at 47 AU: A heliospheric vortex street?
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North-south flows at 47 AU: A heliospheric vortex street?

机译：在47 AU处南北向流动：一条日球涡街？

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摘要

A north-south how pattern with a recurrence period approximately equal to the solar rotation period was observed by Voyager 2 during 1995 at 47 AU, nearly a solar cycle after the north-south flows were first observed near 21 AU during 1986. The north-south flow deflections observed during 1995 were less regular than those observed in 1986. One finds the same qualitative associations between the north-south flows and bulk speed and temperature that were observed in 1986, but the correlations are weaker at the larger distances and higher latitudes. Thus it appears that the flow observed during 1995 is basically the same kind of flow observed in 1986, but it is much less regular owing to evolutionary effects as the flow moves from 21 AU to 47 AU. The observations are consistent with the several predictions of the vortex street model. They fail to support some predictions of both the interaction region model and the vortex street models. It is possible that both a vortex street and interaction regions are significant near solar minimum between 20 and 50 AU. Further development of the models is needed. The interaction models must be extended to include time variations, and the effects of pickup protons should be included in future models of the north-south flows. [References: 24]
机译：Voyager 2在1995年的47 AU观测到了一个复发周期大致等于太阳旋转周期的南北向模式，这是在1986年首次在21 AU附近观测到南北流之后的太阳周期。 1995年观测到的南流偏转比1986年观测到的不规则。人们发现，南北流与总体速度和温度之间的定性联系与1986年观测到的相同，但在较大的距离和较高的纬度上，相关性较弱。 。因此，似乎在1995年观测到的流量与1986年观测到的流量基本相同，但是由于流量从21 AU移至47 AU的演化效应，因此其规律性大大降低。这些观察结果与涡街模型的几个预测是一致的。他们无法支持对交互区域模型和涡街模型的某些预测。靠近20到50 AU的太阳最低点附近，涡街和相互作用区域都可能很明显。需要进一步开发模型。相互作用模型必须扩展为包括时间变化，并且拾取质子的影响应包括在未来的南北流模型中。 [参考：24]

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