Flux Emergence Rate In Coronal Holes And In Adjacent Quiet-sun Regions
Abstract
The rate of emergence of new magnetic flux in coronal holes, and in surroundingregions on the quiet Sun was analyzed from observations from the MichelsonDoppler Imager and the EUV Imager Telescope on the Solar and HeliosphericObservatory (SOHO). Coronal holes are regions where the open magnetic flux ofthe Sun, the component that forms the heliospheric magnetic field, isconcentrated. It is determined that the rate of emergence of new magnetic fluxis systematically lower, by a factor of 2, in coronal holes relative to thesurrounding quiet Sun. This result is consistent with a prediction in a recentmodel for the transport of open magnetic flux on the Sun, which demonstratedthat open flux tends to accumulate and concentrate in regions where the rate ofemergence of new magnetic flux is a local minimum.
- Publication:
-
AAS/Solar Physics Division Meeting #37
- Pub Date:
- June 2006
- Bibcode:
- 2006SPD....37.1403A