Solar coronal streamers
Solar coronal streamers
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太阳日冕飘带
DOI：
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发表时间：
1970
期刊：
影响因子：
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通讯作者：
J. D. Bohlin
中科院分区：
文献类型：
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作者：
J. D. Bohlin
13个冕流的位置是由1964年至1965年期间的日食、K日冕（1 1 1/8≤r≤1 1/2 R）和气球日冕（2<r<6 R）观测的组合确定的。在这些样本中，有三个样本在间隔4天和28天拍摄的照片上观察了两次。这些流光中的大多数可以在结构上与K日冕增强相关联，以确定其盘的位置。那些具有已知盘位置的特征都以活动区和活动区的形式位于色球盘活动的某个阶段之上。三个K-日冕流光增强的平均寿命大约是4个太阳旋转，它们的全部或几乎全部寿命都是已知的。低纬度流光增强（≤30°）的旋转速率基本上与下垫面相同。一个高纬度特征（150 °）覆盖了一个静止的日珥，其速率相当于30°纬度的表面速率。一般来说，这些与流光相关的K-日冕增强会在1014天的时间内出现，并逐渐融入背景日冕图案中而消失。所有观察到的结构解释由本地化的，高密度的功能（流光），覆盖磁盘活动和嵌入在一个统一的，但较弱的方位对称的安静的电晕模型。
The solar disk locations of 13 coronal streamers were determined from a combination of eclipse, K-coronameter (1 1/8≤r≤1 1/2 R⊙), and balloon-borne coronagraph (2<r<6 R⊙) observations taken during 1964 and 1965. Of this sample, three were observed twice on photographs taken over intervals of four and 28 days. Most of these streamers could be structurally associated with K-coronameter enhancements to establish their disk locations.Those features having known disk locations all lay above some stage of chromospheric disk activity in the form of active regions and prominences. The average lifetime of three K-coronameter streamer-enhancements, for which all or nearly all of their lifetimes were known, was about 4 solar rotations. Rotation rates for the lower latitude streamer-enhancements (≤30°) were essentially identical to the underlying surface. One high latitude feature (∼ 50°) which overlay a quiescent prominence had a rate equivalent to the surface rate at 30° latitude. In general those K-coronameter enhancements associated with streamers came into existence over time periods of ⪝ 14 days and disappeared by gradually blending into the background coronal pattern. All the observed structures are explained by a model consisting of localized, high density features (streamers) which overlie disk activity and are imbedded in a uniform but weaker azimuthally-symmetric quiet corona.