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The Relation between Chromospheric and Photospheric Structures in Sunspot Groups

Published online by Cambridge University Press:  14 August 2015

V. Bumba  and
P. Ambrož
V. Bumba
Affiliation:
Astronomical Institute of the Czechoslovak Academy of Sciences, Ondřejov Observatory, Czechoslovakia
P. Ambrož
Affiliation:
Astronomical Institute of the Czechoslovak Academy of Sciences, Ondřejov Observatory, Czechoslovakia

Abstract

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Using the high resolution photographs of the photosphere taken at the Ondřejov observatory a comparison of positions and forms of some chromospheric features with the distribution of photospheric fine structure morphological elements in the August 1972 active region has been made. The close relationship between active filaments, chromospheric threads, fibrils and photospheric small nuclei, dark interpenumbral and intergranular spaces or rudimentar penumbra is shown. Some considerations are demonstrated with the aid of computed models of the horizontal component of the magnetic vector simulating the real distribution of magnetic fields in the studied region.

Type
Part V: The Chromosphere in Active Regions
Information
Symposium - International Astronomical Union , Volume 56: Chromospheric Fine Structure , 1974 , pp. 183 - 191
Copyright
Copyright © Reidel 1974 

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