Other
Scientific paper
Jul 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009acasn..50..289l&link_type=abstract
Acta Astronomica Sinica, vol. 50, no. 3, p. 289-300
Other
1
Sun: Sunspot, Sun: Magnetic Fields, Sun: Photosphere, Sun: Chromosphere, Sun:Activity
Scientific paper
35 obvious bipolar moving magnetic features (MMFs), which appear in sunspot penumbra, are investigated by analyzing filtergrams and magnetograms from Hinode. From analyzing their changes of the configuration, speed and the brightening response of the low solar atmosphere, the following results are obtained: (1) Bipolar MMFs appear in middle penumbra, occur between penumbral filaments with enhanced longitudinal magnetic signals. Both polarities of bipole move radially outward. This indirectly supports the idea that the bipolar MMFs originate from the horizontal magnetic field of the penumbra. There are more than one pair of bipolar MMFs appearing at the same position in 2-8 hours. This provides the evidence of sea-serpent field lines model. (2) The brightening response in photosphere and chromospheres indicates that the motion of the bipoles could heat the low solar atmosphere. (3) The position of bipolar MMFs and the magnetic field distribution of the penumbra provide another support in favor of the uncombed structure of penumbral magnetic fields.
Jiang Yun-Chun
Li Kai-Jun
Shen Yi-Dong
Yang Li-Heng
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