Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982baicz..33..321b&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin, vol. 33, no. 6, 1982, p. 321-331.
Astronomy and Astrophysics
Astronomy
1
Electrophotometry, Magnetic Field Configurations, Solar Magnetic Field, Asymmetry, Magnetic Flux, Magnetic Signatures
Scientific paper
The relation of the magnetic field development in an isolated active region to the dynamics of the background magnetic field is investigated. Only the magnetic field longitudinal component is used to estimate the growth of the magnetic flux values for both polarities. The magnetic field is found to slowly dissipate and enlarge its area during the five rotations after the first appearance of the field. The rate of field expansion in heliographic longitude and latitude is determined to approximate 10 degrees per rotation. It is suggested that the formation of a secondary active region during the postmaximum phase of the development of the main active region is a natural phase in the evolution of the main active region's magnetic field. The active region is considered to be the final product of a secondary active longitude, and after this source has disappeared the system of magnetic fields dissipates in its own way.
Bumba Vaclav
Klvana Mirek
Tomasek P.
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