Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...252..343s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 1, Dec. 1991, p. 343-352.
Astronomy and Astrophysics
Astrophysics
12
Faculae, H Alpha Line, Solar Activity, Solar Flares, Solar Prominences, Solar Spectra, Carbon, Doppler Effect, Line Spectra, Polarimeters, Spectrographs
Scientific paper
A filament in active region AR 2717 was observed in two lines formed at different temperatures (H-alpha at 10 exp 4 K and C IV at 10 exp 5 K) with the multichannel-double-pass (MSDP) spectrograph and the ultraviolet spectrometer and polarimeter (UVSP). The partial disparition brusque (DB) of the filament as observed in H-alpha was due to the heating of a filament section in the vicinity of a bright point. A propagating disturbance followed this event. A detailed analysis of C IV rasters shows that this disturbance was not a passive perturbation, but was itself triggering active phenomena at various locations along its path, resulting in energy releases. It is suggested that this propagation of brightness was due to fast successive reconnections between fine looplike structures of the filament.
Fontenla Juan
Schmieder Brigitte
Tandberg-Hanssen Einar
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