Structure and Cyclic Variations of Open Magnetic Fields in the sun

摘要: The structure and variations of open field regions (OFRs) are analyzed against the solar cycle for time interval 1970–1996. large-scale magnetic (LSMF) begins in vicinity maximum Wolf numbers, i.e. during polar reversal. At beginning LSMF cycle, mid-latitude systems connected by a narrow bridge, but later they evolve independently. at latitudes above 60° has completely configuration fills whole area caps near minimum local fields. this time, essentially all flux is from caps. occur latitude 30–40° away drift slowly towards equator to form typical 'butterfly diagram' periphery zone. This supports concept single complex – 'large-scale active region coronal hole'. rotation characteristics OFRs have been reveal solid-body rotation, much more rigid than case sunspots. shown depend on phase cycle.