Why Do Chromospheric Oscillations in Sunspot Umbrae Appear to Propagate Downward?
Umbral oscillations constitute the most noticeable chromospheric feature of sunspot umbrae—large-amplitude oscillations of intensity (umbral flashes, if very strong) and line-of-sight velocity, with periods of about 3 minutes. These umbral oscillations are usually interpreted as acoustic waves propa...
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| Auteurs principaux: | , , , , , , |
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| Format: | Artigo |
| Langue: | Inglês |
| Publié: |
IOP Publishing
2023-01-01
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| Collection: | The Astrophysical Journal Letters |
| Sujets: | |
| Accès en ligne: | https://doi.org/10.3847/2041-8213/acba7d |
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