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Reconstruction of the Filament Properties, Based on Centenarian Daily Observations of the Sun in Hα Line

Published online by Cambridge University Press:  24 July 2018

Kseniya A. Tlatova ,
Valeriya Vasil’eva  and
Andrey Tlatov
Kseniya A. Tlatova
Affiliation:
Kislovodsk mountain astronomical station of the Pulkovo observatory, 357700, Gagarina str. 100Russia email: [email protected]
Valeriya Vasil’eva
Affiliation:
Kislovodsk mountain astronomical station of the Pulkovo observatory, 357700, Gagarina str. 100Russia email: [email protected]
Andrey Tlatov
Affiliation:
Kislovodsk mountain astronomical station of the Pulkovo observatory, 357700, Gagarina str. 100Russia email: [email protected] Kalmyk State University, Elista, Russia
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Abstract

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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.

Keywords

Sunsolar filamentslong-term variations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S335: Space Weather of the Heliosphere: Processes and Forecasts , July 2017 , pp. 187 - 190
Copyright
Copyright © International Astronomical Union 2018 

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