The Origin of "Unipolar" Magnetic Flux Emergence

Details The Origin of "Unipolar" Magnetic Flux Emergence The Origin of "Unipolar" Magnetic Flux Emergence

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.0706l&link_type=abstract

American Astronomical Society, SPD meeting #37, #7.06; Bulletin of the American Astronomical Society, Vol. 38, p.228

Astronomy and Astrophysics

Astronomy

Scientific paper

Automated tracking of magnetograms provides the ability to detect magnetic features in an unbiased manner. Such feature tracking shows many apparent unipolar flux emergences. Flux conservation dictates that this cannot be a real phenomenon and thus must be due to processes below the detection limit of routine measurements. We use large numbers of these apparent unipolar events to distinguish between two models of small-scale magnetic flux formation. We find that asymmetric flux emergence, in which the poles of the emerging flux tube have different cross sections or incidence angles at the photosphere, can account for at most half of the events. Convergence of like-polarity poles due to flows at sub-resolution scales provides a better explanation for the majority of the events.

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