singly ionized Barium, Ba II at 6141.73Å
I scanned the Sun into a cube, containing the Ba II line at 6141.73Å which, like we’ve seen with ionized metals before, turn the active regions dark, instead of letting them shine against a darker photosphere. The atmosphere was remarkably calm on 2025-04-21, and further, the disks were anti-jagged by an experimental feature in JSolEx.
Fe I, neutral iron at 6136.6A
continuum
line core vs continuum enhancing
