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- Title
Bright points and ejections observed on the sun by the KORONAS-FOTON instrument TESIS.
- Authors
Ulyanov, A. S.; Bogachev, S. A.; Kuzin, S. V.
- Abstract
Five-second observations of the solar corona carried out in the FeIX 171 Å line by the KORONAS-FOTON instrument TESIS are used to study the dynamics of small-scale coronal structures emitting in and around coronal bright points. The small-scale structures of the lower corona display complex dynamics similar to those of magnetic loops located at higher levels of the solar corona. Numerous detected oscillating structures with sizes below 10 000 km display oscillation periods from 50 to 350 s. The period distributions of these structures are different for P < 150 s and P > 150 s, which implies that different oscillation modes are excited at different periods. The small-scale structures generate numerous flare-like events with energies 10-10 erg (nanoflares) and with a spatial density of one event per arcsecond or more observed over an area of 4 × 10 km. Nanoflares are not associated with coronal bright points, and almost uniformly cover the solar disk in the observation region. The ejections of solar material from the coronal bright points demonstrate velocities of 80-110 km/s.
- Subjects
SOLAR corona; OSCILLATIONS; ASTRONOMY; FORCE &; energy; SPEED; SUN
- Publication
Astronomy Reports, 2010, Vol 54, Issue 10, p948
- ISSN
1063-7729
- Publication type
Article
- DOI
10.1134/S1063772910100082