Figure 3: EIS plasma composition map. | Nature Communications

Figure 3: EIS plasma composition map.

From: Full-Sun observations for identifying the source of the slow solar wind

Figure 3

Display version of the full-sun plasma composition map created from the ratio of the Si X 258.37 Å and S X 264.22 Å spectral lines. Darker areas correspond to regions with photospheric abundances. Lighter areas correspond to regions with enhanced (coronal) abundances. To reduce noise, we treated the map using a Fast Fourier Transform filtered by a Hanning mask, and excluded bad pixels and regions outside the solar limb. All of the analysis was performed on the untreated data60.

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