I used my solex setup to image the singly ionized iron right next to the forbidden oxygen. The signal is strong there. I cleaned up the image to remove most of the artefacts. Stack of 17 scans. 2025-04-21.
The Red Barium Sun
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. (tovább…)
The Solar Disks Spectrum Atlas
From some of the data I recorded, among which there are quite a few comparatively wide cubes, I assembled the Atlas and published the software platform and the first cubes in it.
And the research note on the atlas: https://iopscience.iop.org/article/10.3847/2515-5172/adef50
Stuff I found on the net about this:
https://solarchatforum.com/viewtopic.php?t=50095
https://solarchatforum.com/viewtopic.php?p=476026
https://www.cloudynights.com/forums/topic/970675-first-ever-browsable-solar-spectrum-atlas/
Iron Sun, Fe II at 5018.45Å, on 2025-05-02
Sol’Ex, JSol’Ex, stacks of 28 individual spectroheliograms
The Sun at 4549.6Å, in Fe II and Ti II on 2025-05-02
Sol’Ex, JSol’Ex, stack of six scans
