Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...259..431f&link_type=abstract
Astrophysical Journal, Part 1, vol. 259, Aug. 1, 1982, p. 431-436. NSF-supported research.
Astronomy and Astrophysics
Astrophysics
6
Density Distribution, Electron Density (Concentration), Solar Corona, Solar Electrons, Solar Rotation, Sunspot Cycle, Astronomical Maps, Autocorrelation, Solar Atmosphere, Solar Magnetic Field, Time Dependence
Scientific paper
K-coronameter observations of the white light corona, made in 1980-1981, show that a persistent global pattern in the distribution of electron density existed during this phase of the sunspot cycle. The amplitude of the density distribution is time dependent, and there is a pronounced difference of persistence observed between the equatorial structure and high-latitude coronal features. Some high-latitude features persist for more than four solar rotations, while structure located between 50 deg N and 50 deg S has a typical evolutionary time scale of two rotations. Both the high-latitude and equatorial structure of the corona rotated with a synodic period of 28.0 days; structure near the active zone showed a slightly faster rotation rate, having a synodic period of 27.6 days.
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