论文标题
极性羽毛对快速太阳风的贡献
Contribution of polar plumes to fast solar wind
论文作者
论文摘要
语境。太阳极羽的几种物理特性已经通过不同的已发表研究鉴定出来，但是这种研究很少见，有时是分歧。目标。本工作的目的是分析一组专门针对羽毛观察的SOHO/UVC数据，并通过自洽分析获得中间太阳能电晕中羽状物的物理特性的图片。方法。我们将多普勒调光技术应用于Soho/UVC在1996年4月获得的数据，该数据是在任务的早期阶段。从中，我们得出了流出速度和电子密度。我们将SOHO/LASCO图像用作上下文数据，以便更好地识别UVCS视野中的羽流和互相插图区域。结果。我们获得的结果表明，在四个羽流中的三种情况下，流出速度与羽毛间的流出速度相当，而在单个情况下，羽流的速度较低。我们估计，羽毛对来自太阳能电线杆的风的贡献约为20％，并且不同的羽毛提供了不同的贡献，可能会根据其进化的不同阶段。结论。我们得出的结论是，李子不是静态结构，它们对来自太阳能电线杆的风产生了重大贡献。
Context. Several physical properties of solar polar plumes have been identified by different published studies, however such studies are rare and sometimes in disagreement. Aims. The purpose of the present work is to analyze a set of SOHO/UVCS data dedicated to the observation of plumes and to obtain a picture of the physical properties of plumes in the intermediate solar corona through a self-consistent analysis. Methods. We applied the Doppler Dimming technique to data acquired by SOHO/UVCS in April 1996, which was during the very early phases of the mission. From this we derived outflow speeds and electron densities. We used SOHO/LASCO images as context data in order to better identify plume and interplume regions in the UVCS field of view. Results. The results we obtain demonstrate that in three cases out of four plumes expand with outflow speeds comparable to those of interplumes, and in a single case with lower speeds. We estimate that the contribution of plumes to the wind coming from the solar poles is about 20%, and that different plumes provide a different contribution, possibly according to different stages of their evolution. Conclusions. We conclude that plumes are not static structures, and that they contribute significantly to the wind coming from the solar poles.
