Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh13a0279m&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SH13A-0279
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7509 Corona, 7524 Magnetic Fields, 7529 Photosphere
Scientific paper
Much effort has been made to clarify the topological properties of the magnetic structure formed above the photosphere, such as separator, separatrix layers and bald patches. Here we use a dynamic model to investigate how the magnetic structure evolves through the continuous emergence of magnetic field into the photosphere. The emergence of magnetic field is reproduced by a so-called flux emergence MHD simulation in which magnetic field evolves through a highly stratified atmosphere extending from the subphotosphere to the corona. The present work focuses on the twist of the magnetic field forming a flux tube below the photosphere. By comparing a weakly twisted case and highly twisted case, we demonstrate how the twist relates with the topological properties of the magnetic structure formed above the solar surface.
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