Physics – Plasma Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsh51c..01m&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SH51C-01
Physics
Plasma Physics
7500 Solar Physics, Astrophysics, And Astronomy, 7513 Coronal Mass Ejections, 7524 Magnetic Fields, 7800 Space Plasma Physics, 7843 Numerical Simulation Studies
Scientific paper
We used three-dimensional MHD simulation to study the evolution of U-shaped magnetic field lines (U-loops) in a flux cancellation region on the Sun. Emergence of U-loops is thought to be a process for causing flux cancellation at the solar surface, although the physical mechanism for this process is not obvious because the mass tends to accumulate at the dipped part of U-loops thereby reducing the buoyancy. Our flux emergence simulation reveals that a temporary siphon flow plays a key role in enhancing the buoyancy of the dipped part of U-loops and helps it emerge into the solar atmosphere against the gravity. By applying a model of emerging U-loops to an observed flux cancellation region, we study a possible configuration of magnetic field lines related to flux cancellation.
Antiochos Spiro K.
DeVore Richard C.
Linton Mark G.
Magara Tetsuya
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