| Issue |
A&A
Volume 704, December 2025
|
|
|---|---|---|
| Article Number | A60 | |
| Number of page(s) | 8 | |
| Section | The Sun and the Heliosphere | |
| DOI | https://doi.org/10.1051/0004-6361/202555319 | |
| Published online | 01 December 2025 | |
Formation of chromospheric Fe I lines in the near-ultraviolet in 1D atmospheres
1
Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
2
Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
3
Aalto University, Department of Computer Science, Konemiehentie 2, 02150 Espoo, Finland
⋆ Corresponding author: harnes@mps.mpg.de
Received:
28
April
2025
Accepted:
1
September
2025
In the near-ultraviolet part of the solar spectrum lie several Fe I lines with very broad profiles that are typical of chromospheric lines. These lines are largely unexplored because high-resolution data in this region were lacking. This changed with the successful SUNRISE III flight in 2024, when spectropolarimetric data were recorded with high spatial, spectral, and temporal resolution covering a large variety of solar targets.
Key words: line: formation / line: profiles / radiative transfer / Sun: chromosphere / Sun: photosphere / Sun: UV radiation
© The Authors 2025
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Open Access funding provided by Max Planck Society.
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