Coronal Hole Topology

Details Coronal Hole Topology Coronal Hole Topology

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spd....34.0102a&link_type=abstract

American Astronomical Society, SPD meeting #34, #01.02; Bulletin of the American Astronomical Society, Vol. 35, p.805

Physics

Scientific paper

A key problem for Solar/Heliospheric physics is understanding the structure and dynamics of the open magnetic field regions on the Sun, the so-called coronal holes. There has been considerable debate in recent years on the nature of coronal hole evolution, in particular, on how closed and open field regions interact. We use the source surface model to investigate in detail the topology of the solar coronal field in cases where closed-field active regions interact with the boundaries of coronal holes. These studies lead us to the conjecture that in any continuously connected polarity region on the photosphere, there can be at most one coronal hole, but this open field region is likely to be highly complex with narrow corridors of open flux connecting apparently isolated coronal holes. We discuss both the observational and theoretical implications of our conjecture for the Sun - Heliosphere connection.
This work was supported in part by NASA and ONR.

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