Small Bipoles Interacting with a Coronal Hole: MHD Simulations

Details Small Bipoles Interacting with a Coronal Hole: MHD Simulations Small Bipoles Interacting with a Coronal Hole: MHD Simulations

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh51b1602l&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH51B-1602

Physics

7509 Corona, 7511 Coronal Holes, 7524 Magnetic Fields

Scientific paper

Changes in the photospheric magnetic flux due to emergence, submergence, and surface flows drive the evolution of the coronal and heliospheric magnetic field. We have used our 3D MHD algorithm in spherical coordinates to study the interaction of the magnetic field of two bipoles with a coronal hole. We have prescribed as magnetic flux distribution at the lower boundary a smoothed Kitt Peak magnetogram for Carrington Rotation 1913 (late August 1996), to which we have added two small bipoles. After reaching a relaxed state, we have introduced surface flows, which evolve the magnetic flux distribution at the boundary. We have investigated the reconfiguration of coronal fields in response to these motions; in particular we show what happens to the open flux associated with the bipole when it is moved into a previously closed region.

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