Query : 2001A&A...367.1022J

2001A&A...367.1022J - Astronomy and Astrophysics, volume 367, 1022-1032 (2001/3-1)

Filament activity and photospheric magnetic evolution related to flares.


Abstract (from CDS):

Three successive activations of an active-region filament were observed over a period of eight hours. Each disturbance showed distinctive characteristics and was followed by a flare of different properties. The filament had one end rooted in strong δ-sunspots. During the first activation, the filament rose up at the rooting end and detached from the δ-sunspots while its main body remained in place and separated into two twisted threads. During the second activation, only one thread was disturbed and finally disappeared; twisted threads, however, appeared during the third activation. The evolution of photospheric magnetic fields, associated with the filament disturbances, was characterized by squeezing and shearing of δ-sunspots, flux cancellation and emergence beneath the two ends of the filaments. Our data suggests that magnetic reconnection in the photospheric layer is the likely cause of filament destabilisation.

Abstract Copyright:

Journal keyword(s): Sun: prominences - Sun: filaments - Sun: activity - Sun: flares - Sun: magnetic fields

Simbad objects: 0

goto Full paper

goto View the references in ADS

Number of rows : 0

To bookmark this query, right click on this link: simbad:objects in 2001A&A...367.1022J and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact