High-resolution spectroscopy of a minifilament eruption | Ioannis Kontogiannis
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21.10.2021
Co-author
Affiliation
Leibniz-Institut für Astrophysik Potsdam (AIP), Germany
Main category
Natural Sciences (Astrophysics and Astrononmy)
Caption
Minifilaments are miniature versions of filaments, first observed in H-alpha filtergrams of quiet Sun. Recent studies have showcased their association with small-scale eruptive events, highlighting their importance in energetic processes of the quiet Sun. We present the first detailed study of such an event, using high-cadence, high-spectral resolution imaging observations. The minifilament formed between small-scale, opposite-polarity magnetic concentrations and erupted within an hour after its appearance in H-alpha, exhibiting a twisted, thread-like structure. Its eruption took place in two phases (slow and fast), producing a coronal dimming, while part of the erupting material returned to the chromosphere. The observed similarities to large-scale filament eruptions indicate the action o
Further information
Further reading
Link to the European Solar Physics Online Seminars (ESPOS) webpage: https://espos.stream/2021/10/21/Kontogiannis/
Language
English
DOI
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