Processes observable in the photosphere during the formation of an active region. I - Development of a very small, secondary active region

Details Processes observable in the photosphere during the formation of an active region. I - Development of a very small, secondary active region Processes observable in the photosphere during the formation of an active region. I - Development of a very small, secondary active region

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983baicz..34..349b&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 34, Sept. 1983, p. 349-354.

Astronomy and Astrophysics

Astronomy

3

Photosphere, Solar Activity, Sunspots, Magnetic Flux, Solar Granulation, Solar Magnetic Field, Solar Radio Emission

Scientific paper

Observations made with the Ondrejov radiospectrograph in the frequency band 70-810 MHz on July 4, 1974 are used to investigate processes accompanying the formation of a very small secondary active region. The formation of this region is examined in relation to the development of a new local magnetic field on the background field through restructuring and dissipation and in relation to the evolution of a small bipolar sunspot group. Magnetic flux values are estimated, and attention is given to the morphology of the transformation of small sunspots and to two modes of small-sunspot disintegration.

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