Reconstruction of the Filament Properties, Based on Centenarian Daily Observations of the Sun in Hα Line
Abstract
Preliminary results of distinguishing solar filaments on daily observation data at the Hα spectral line of the Kodaikanal Solar Observatory (1912-2002) are presented.
To distinguish the boundaries of solar filaments, methods have been developed, based on automatic procedures for distinguishing low-contrast objects on the solar disk as well as on editing the boundaries of selected structures in semi-automatic mode. An analysis of solar filaments' characteristics has been performed. We are considered variation of the average tilt-angle and the radius of curvature of the filaments in 15-23 cycles of activity.- Publication:
-
Space Weather of the Heliosphere: Processes and Forecasts
- Pub Date:
- August 2018
- DOI:
- 10.1017/S1743921317008195
- Bibcode:
- 2018IAUS..335..187T
- Keywords:
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- Sun;
- solar filaments;
- long-term variations