Singular points of center type in the solar chromosphere

Details Singular points of center type in the solar chromosphere Singular points of center type in the solar chromosphere

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990azh....67.1309m&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 67, Nov.-Dec. 1990, p. 1309-1314. In Russian.

Astronomy and Astrophysics

Astronomy

3

Chromosphere, Solar Atmosphere, Solar Magnetic Field, Astronomical Models, Electric Current, Magnetic Field Configurations, Solar Prominences, Sunspots

Scientific paper

Center-type singular points are observed in the chromosphere, indicating that electric currents can cross the plane of the chromosphere. These currents are associated with spots having an azimuthal field or with filaments. The centers are observed in the vicinity of spot penumbras or near sharply etched filament ends. In the first case the singular points form a knot-saddle-center group, while in the second they form isolated singular points. It is suggested that the current of a filament can be considered as an external parameter in the problem of filament equilibrium and stability.

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