MHD Simulations of Small Active Regions Interacting with Coronal Holes

Details MHD Simulations of Small Active Regions Interacting with Coronal Holes MHD Simulations of Small Active Regions Interacting with Coronal Holes

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh22a0845l&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH22A-0845

Physics

7509 Corona, 7511 Coronal Holes, 7524 Magnetic Fields, 7526 Magnetic Reconnection (2723, 7835)

Scientific paper

We use our 3D MHD algorithm in spherical coordinates to study the interaction of the magnetic field of two small bipoles with that of a coronal hole. To prescribe the magnetic flux distribution at the lower boundary, we add two bipolar active regions to a smoothed Kitt Peak magnetogram for Carrington Rotation 1913 (late August 1996). Starting from a potential field extrapolation and a 1D solar wind solution, we relax the configuration until coronal holes, streamers, and the heliospheric current sheet are formed. At this point we introduce surface flows, which evolve the magnetic flux distribution at the boundary. We study the reconnection events and the changes in the distribution of closed and open magnetic flux associated with the bipolar active regions.

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