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Solar Polar Field Observed by SOHO /MDI and Hinode

机译：SOHO / MDI和Hinode观察的太阳能极地

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Using 1-minute cadence time-series full disk magnetograms taken by SOHO/MDI in 2007 March, and the corresponding Hinode/SOT vector mag-netograms, I have studied evolutionary characteristics of magnetic elements in Sun's south polar region in solar minimum. It is found that the lifetime of mag-netic elements is 17.0 hours on average with an average lifetime of 21.8 hours for elements with positive field, the dominant polarity in the south pole, and 1.6 hours for elements with negative field. The elements with positive field are dominant in the south pole with a percentage of 76% in element number and 90.5% in magnetic flux. The lifetime and magnetic flux of the elements is found to be highly related. This agrees with some previous studies for the elements in low latitude quiet regions.Using an image cross correlation method, I also measure solar rotation rate at high latitude, up to 85 in latitude, which is w == 2:914-0.342 x sin~2Φ-0.482x sin~4Φ μrad/s sidereal. It agrees with previous studies using spectroscopic and image cross correlation methods, and also agrees with the results from some work using the element tracking method in which the sample of tracked elements is large. The consistency of those results from different data and methods strongly suggests that this rate at high latitude is reliable.
机译：使用SOHO / MDI的1分钟的Cadence Time系列全磁盘磁图，以及相应的Hinode / Sot Vector Mag-Netographs，我研究了太阳最小阳光南极区域磁性元素的进化特性。结果发现，磁性元素的寿命平均为17.0小时，平均寿命为21.8小时，元素为阳性场，南极中的主极性，元素为1.6小时，具有负场的元素。具有阳性场的元素在南极中占主导地位，元素数量为76％，磁通量为90.5％。发现元件的寿命和磁通量非常相关。这同意了以前的一些研究对低纬度静音区域中的元素。使用图像互相关方法，我还测量高纬度的太阳旋转速率，高达85的纬度，这是w == 2：914-0.342 x sin 〜2φ-0.482x Sin〜4φμrad/ s恒星。它同意使用光谱和图像交叉相关方法的先前研究，并且还通过使用其中所跟踪元件样本大的元件跟踪方法来同意一些工作的结果。来自不同数据和方法的结果的一致性强烈建议在高纬度下的这种速度是可靠的。

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