A Caltech Library Service

Application of the Chromospheric Magnetograph to Active Regions

Zirin, H. (1971) Application of the Chromospheric Magnetograph to Active Regions. In: Solar Magnetic Fields. International Astronomical Union Symposium (IAUS). No.43. Springer Netherlands , Dordrecht, pp. 237-242. ISBN 9789401031196.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
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.
Funding AgencyGrant Number
Subject Keywords:Active Region; Sunspot Group; Magnetic Field Structure; Spot Group; Magnetic Symmetry
Series Name:International Astronomical Union Symposium (IAUS)
Issue or Number:43
Record Number:CaltechAUTHORS:20201013-155619681
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106049
Deposited By: George Porter
Deposited On:14 Oct 2020 14:35
Last Modified:16 Nov 2021 18:49

Repository Staff Only: item control page