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Analysis and results of cooperative magnetographic measurements. II. Comparison and interpretation of the current densities
Author(s) -
Hofmann A.,
Grigorjev V. M.,
Selivanov V. L.
Publication year - 1988
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113090608
Subject(s) - physics , solar observatory , observatory , current (fluid) , flux (metallurgy) , scaling , astrophysics , electric current , azimuth , computational physics , optics , geometry , mathematics , materials science , quantum mechanics , metallurgy , thermodynamics , magnetic field
We compare and interpret distributions of vertical electric current densities derived from nearly simultaneous vector measurements by the magnetographs of the Sayan Observatory (Irkutsk) and the Potsdam Solar Observatory. The derived distributions of current densities of the different observations are in good agreement referring to the scaling factors and the morphological structure. The zero points differ within the noise level amounting to 0.8 * 10 ‐3 Am ‐2 for the Sayan observation and to 1.3 * 10 ‐3 Am ‐2 for the Potsdam observation. In the spot under study we found several current filaments indicating that the spot is clustered by several flux bundles. An azimuthal current between (5.9 ± 1.4) * 10 11 A and (6.8 ± ± 1.5) * 10 11 A flowing around a (relatively isolated) flux bundle can be derived from the observations.