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High-resolution Spectroscopic Imaging of Counter-streaming Motions in Solar Active Region Magnetic Loops

  • Authors: Xu Yang, Wenda Cao, Haisheng Ji, Parida Hashim, and Jinhua Shen

2019 The Astrophysical Journal Letters 881 L25.

  • Provider: AAS Journals

Caption: Figure 4.

Time–distance diagrams in Hα −0.8 Å and +0.4 Å, He I 10830 ± 0.4 Å, AIA 304 and 171 Å for the cutting strips along the long loop 1 and long loop 2. Note that the red-wing absorption features in He I 10830 Å and Hα move eastward along the long loop 1, as indicated by the arrow in the Figure 3(a1). The mass flow inside the long loop 2 is also unidirectional and only contains blue-wing absorption features.

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