新浮现卫星磁场引发的Hα喷流

发布时间：2018-03-09 06:15

本文选题：太阳　切入点：大气　出处：《天文学报》2013年04期 　论文类型：期刊论文

【摘要】：2011年7月22日在活动区NOAA 11259爆发太阳大气Hα喷流事件.根据美国大熊湖天文台的全日面Hα观测,发现在活动区主黑子北部同一位置连续爆发3次Hα喷流.这3次喷流的喷发轨迹都呈直线形,其整体形态像倒埃菲尔铁塔.前两次喷流爆发过程很相似,都是在主黑子北部先出现2个亮点,几分钟后喷流出现在亮点中间,等亮点亮度达到极大后,喷流从亮点中间加速爆发,达到最大高度后迅速消失.第3次喷流爆发前并没有亮点出现,而且其最大高度只有前两次喷流的一半.对比SDO/HMI(SolarDynamics Observatory/Helioseismic andMagnetic Imager)视向磁场数据,发现第1次喷流出现前一个多小时,爆发区域内就有双极磁场浮现出来,并且在每次喷流爆发前几分钟,正极性磁流都减少.分析认为是新浮现卫星磁场与黑子内磁场发生重联,从而引起喷流的连续爆发.
[Abstract]:The solar atmospheric H 伪 jet event broke out in the active region NOAA 11259 on July 22nd 2011. According to the full solar surface H 伪 observations of the Great Bear Lake Observatory in the United States, It was found that three H 伪 ejections occurred continuously at the same position in the northern part of the main sunspot in the active area. The ejection trajectories of the three jets were all linear, and the whole shape was like that of the inverted Eiffel Tower. The first two eruptions were very similar to each other. Two bright spots appeared in the northern part of the main sunspot. A few minutes later, the jet flowed out of the middle of the current bright spot. After the brightness of the bright spot reached a maximum, the jet accelerated from the bright spot to the middle of the light spot. Before the third jet burst, there was no bright spot, and its maximum height was only half that of the previous two jets. Comparing the SDO/HMI(SolarDynamics Observatory/Helioseismic andMagnetic Imager apparent magnetic field data, we found that the first jet appeared more than an hour before the first jet. A bipolar magnetic field emerges in the explosive region, and the positive magnetic flux decreases a few minutes before each eruption. It is considered that the newly emerging satellite magnetic field reconnects with the magnetic field in the sunspot, thus causing the continuous burst of the jet.
【作者单位】：南京信息工程大学物理与光电工程学院;中国科学院紫金山天文台;
【基金】：南京信息工程大学科研启动经费项目(S8110136001) 南京信息工程大学实验室开放项目(N1081005072)资助
【分类号】：P182

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