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| Paper: |
Bipolar Magnetic Structures in Sunspot Penumbrae |
| Volume: |
454, The 3rd Hinode Science Meeting |
| Page: |
221 |
| Authors: |
Sainz Dalda, A.; Bellot Rubio, L. R. |
| Abstract: |
We present a study of bipolar, sea-serpent-like structures in the
penumbra of sunspots. Our analysis is based on longitudinal
magnetograms and full Stokes spectra of AR 10923 taken with the NFI
and SP instruments of Hinode. The circular polarization maps reveal
the presence of many elongated structures in the mid penumbra and
beyond. They consist of two opposite-polarity patches that move
together as a single entity toward the outer penumbral boundary,
where they become moving magnetic features. Their Stokes profiles
suggest a complex magnetic topology. The existence of opposite
polarities in the penumbra is well known from previous analyses, but
this is the first time that their bipolar nature is unveiled. Our
observations also demonstrate that they are intimately connected with
the Evershed flow. These structures provide new constraints to
theoretical and numerical models of sunspots. |
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