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SUBSURFACE CONVECTIVE FLOWS WITHIN ACTIVE REGIONS

机译:处于活动区域内的地下对流流

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Using our newly developed high-resolution ring analysis (HRRA) technique we measure subsurface flows within and surrounding magnetic active regions. With this procedure we are capable of measuring flows with a horizontal spatial resolution of 2° in heliographic angle (or roughly 20 Mm). Using MDI magnetograms, we define contours of equal magnetic field strength for all active regions that appear within 60° of disk center between 29 March - 24 April 2002. Using the flow fields computed with our HRRA procedure, we compute the average curl, divergence and inflow speed inside each of these contours, and characterize these mean flow properties as a function of magnetic field strength. We find that on average all active regions possess a mean inflow near the periphery of the region (weak field) and an outflow within the core of the active region (strong field) that is predominantly the result of the well-known sunspot outflows [1]. The mean divergence is consistent with these inflow results (net divergence in the core and convergence in the periphery). We find no evidence for a mean curl that is different from zero.
机译:使用我们新开发的高分辨率环分析(HRRA)技术,我们测量磁性有源区内和周围的地下流动。利用这种方法,我们能够在直波图(或大约20mm)中测量具有2°的水平空间分辨率的流动。使用MDI磁力图,我们为所有活动区域定义了相同磁场强度的轮廓,这些方面的磁盘中心在3月29日至2002年4月24日至24日至4月24日之间。使用通过我们的HRRA程序计算的流场,我们计算平均卷曲,分歧和分歧在这些轮廓中的每一个内部的流入速度,并作为磁场强度的函数表征这些平均流量。我们发现,平均地区所有有源区都具有附近区域(弱场)的周边附近的平均流入,以及主核心(强田)的核心内的流出,这主要是着名的太阳黑子外流的结果[1 ]。平均分歧与这些流入结果一致(核心循环和周边收敛的净分歧)一致。我们发现没有任何与零不同的卷曲的证据。

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