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Published 1971 | public
Book Section - Chapter

Application of the Chromospheric Magnetograph to Active Regions

Zirin, H.

Abstract

We show how to determine the magnetic field structure in active regions from the Ha morphology. We also show the role of the EFR (emerging flux region) as a bipolar region of velocity downflow. Finally, we point out that since all new magnetic flux emerges in strictly bipolar form, complex spot groups must result from surface interaction, hence most of the solar surface field may be produced on the surface.

Additional Information

© International Astronomical Union 1971. I am indebted to A. Bhatnagar and J. Adkins for magnetograms, and to Peter Foukal for numerous discussions. This work was supported by NASA and by the Atmospheric Sciences section of the NSF.

Additional details

Created:
August 22, 2023
Modified:
January 15, 2024