On the linear and quasi-oscillatory components of proper motions as obtained from observations on January 13, 1984.

Details On the linear and quasi-oscillatory components of proper motions as obtained from observations on January 13, 1984. On the linear and quasi-oscillatory components of proper motions as obtained from observations on January 13, 1984.

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990bsold...4...77i&link_type=abstract

Byulletin Solnechnye Dannye Akademie Nauk USSR, No. 4/90, p. 77 - 83

Computer Science

2

Sunspots: Oscillations, Solar Flares: Oscillations

Scientific paper

On the basis of a series of photoheliograms and using the precision method "Helicor" heliographic coordinates φ, λ were determined for 48 elements of 4 sunspots. Analysing the mean statistical horizontal velocity field of each sunspot as a whole the authors divided motions into linear and non-linear components. The non-linear component shows the presence of two independent φ and λ oscillation modes with the local periods 70 - 200 min and the frequency of the φ-mode exceeds that of the λ-mode for each of the considered sunspots. In sunspots, belonging to the same flare-active region, synchronization of horizontal quasi-oscillations has place.

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