Pattern recognition applied to Halpha spectroheliograms solar rotation and meridional circulation

Details Pattern recognition applied to Halpha spectroheliograms solar rotation and meridional circulation Pattern recognition applied to Halpha spectroheliograms solar rotation and meridional circulation

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.344..145c&link_type=abstract

In ESA, Solar Physics and Astrophysics at Interferometric Resolution p 145-148 (SEE N93-10901 01-90)

Astronomy and Astrophysics

Astrophysics

2

H Alpha Line, Meridional Flow, Pattern Recognition, Solar Rotation, Spectrograms, Image Processing, Spectroheliographs

Scientific paper

The surface rotation of the Sun can be investigated by observing the motions of magnetic features observed in the solar atmosphere and embedded in the interior. These tracers are sunspots, bright facula, and dark H (alpha) features called filaments. To observe their dynamics with high resolution, pattern recognition methods have to be used. A pattern recognition procedure for extracting and tracking filaments which derives rotational and meridional motions with unequalled accuracy is described. The resolution is limited only by the spatial resolution of the image.

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