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Paper: Determination of the Velocity Vector Field in an Asymmetric Sunspot Based on Vector Magnetograph Measurements
Volume: 184, Third Advances in Solar Physics Euroconference: Magnetic Fields and Oscillations
Page: 108
Authors: Krivtsov, A. M.; Hofmann, A.; Staude, J.; KlvaƱa, M.; Bumba, V.
Abstract: A new method to determine the distribution of the full velocity vector in an asymmetric sunspot is presented. Measurements of the Doppler velocity and of the vector of the magnetic field are used as initial data for these calculations. The determination is subdivided into two stages: in a first step we obtain the distribution of the velocity projection onto the solar surface, and in the second step the orthogonal component of the velocity field is calculated. The resulting vector velocity field is in good agreement with the basic features of the siphon flow model of penumbral flux tubes.
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