An example of the cancellation of magnetic fields during the decay of an active region |
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| Authors: | J I García De La Rosa M A Aballe M Collados |
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| Institution: | (1) Instituto de Astrofisica de Canarias, 38200 La Laguna, Tenerife, Spain |
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| Abstract: | A case of cancellation of magnetic fields is observed during the decay of a small active region. Three different sources of information were simultaneously used: high resolution magnetograms, chromospheric Caii filtergrams and transverse velocity fields.A magnetic structure is apparently dragged to the network by the supergranular velocity field while it splits into two. There, they meet another structure with opposite magnetic polarity. After a period of coexistence, the magnetic pairs vanish, leaving no trace of either magnetic or chromospheric structures.Visiting astronomer, Sacramento Peak Observatory, operated by the Association of Universities for Research in Astronomy, Inc. under contract AST-78-17292 with the National Science Foundation. |
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