Magnetic Feature Tracking in Sunspot Moats Using Hinode/SOT Observations

Details Magnetic Feature Tracking in Sunspot Moats Using Hinode/SOT Observations Magnetic Feature Tracking in Sunspot Moats Using Hinode/SOT Observations

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0908h&link_type=abstract

American Astronomical Society, SPD meeting #40, #9.08; Bulletin of the American Astronomical Society, Vol. 41, p.818

Astronomy and Astrophysics

Astronomy

Scientific paper

A long series of continuous observations of NOAA AR 10933 taken by Hinode/SOT from 2-4 January, 2007 is used to study MMF's (moving magnetic features) in the periphery of the large sunspot in the region and its surrounding moat. We describe some algorithms we have developed to quickly recognize and track discrete features and apply these to the magnetic structures seen in Na I 589.6nm Stokes V images. Because the features evolve and show variable visibilty, automatic tracking is not always successful even with the seeing free Hinode images and we are still attempting to improve our techniques. We also compute flow maps from the photospheric G band images using LCT (local correlation tracking) to compare with the generally faster MMF motions.
This work was supported by NASA contract NNM07AA01C.

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