Continuous plasma outflows from the edge of a solar active region as a possible source of solar wind
Continuous plasma outflows from the edge of a solar active region as a possible source of solar wind
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DOI：
10.1126/science.1147292
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发表时间：
2007-12-07
期刊：
影响因子：
56.9
通讯作者：
Nakatani, Ichiro
中科院分区：
文献类型：
--
作者：
Sakao, Taro;Kano, Ryouhei;Nakatani, Ichiro
太阳不断地将大量的电离物质以太阳风的形式喷射到行星际空间。尽管太阳风对日球层环境有影响，但它的起源还没有被很好地确定。本文报道了日野x射线望远镜对太阳活动区的观测结果。在活动区域的边缘，靠近一个日冕洞，一种软x射线发射等离子体连续流出的模式被识别出来，沿着明显开放的磁场线，进入日冕的上部。对流出等离子体的温度和密度的估计表明，其质量损失率相当于太阳风总质量损失率的1/4。这些喷流可能表明太阳上的太阳风源之一。
The Sun continuously expels a huge amount of ionized material into interplanetary space as the solar wind. Despite its influence on the heliospheric environment, the origin of the solar wind has yet to be well identified. In this paper, we report Hinode X-ray Telescope observations of a solar active region. At the edge of the active region, located adjacent to a coronal hole, a pattern of continuous outflow of soft-x-ray-emitting plasmas was identified emanating along apparently open magnetic field lines and into the upper corona. Estimates of temperature and density for the outflowing plasmas suggest a mass loss rate that amounts to similar to 1/4 of the total mass loss rate of the solar wind. These outflows may be indicative of one of the solar wind sources at the Sun.