red line

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Term: red line
Definition:

An intense coronal emission line at 637.4 nm from Fe X. It identifies relatively cooler regions of the corona.
NOAA SWPC SpWx Glossary Planetary Astrophysics Heliophysics
Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan
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https://n2t.net/ark:/99152/h9976