Characterization of the slow wind in the outer corona

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• 作者：Lucia Abbo ; Ester Antonucci ; Zoran Mikić ; Jon A. Linker ; Pete Riley ; Roberto Lionello
• 关键词：Sun ; Corona ; Solar wind ; MHD model
• 刊名：Advances in Space Research
• 出版年：2010
• 出版时间：1 December 2010
• 年：2010
• 卷：46
• 期：11
• 页码：1400-1408
• 全文大小：606 K

文摘

The study concerns the streamer belt observed at high spectral resolution during the minimum of solar cycle 23 with the Ultraviolet Coronagraph Spectrometer (UVCS) onboard SOHO. On the basis of a spectroscopic analysis of the O VI doublet, the solar wind plasma parameters are inferred in the extended corona. The analysis accounts for the coronal magnetic topology, extrapolated through a 3D magneto-hydrodynamic model, in order to define the streamer boundary and to analyse the edges of coronal holes. The results of the analysis allow an accurate identification of the source regions of the slow coronal wind that are confirmed to be along the streamer boundary in the open magnetic field region.