Hinode Observations of Horizontal Quiet Sun Magnetic Flux and the “Hidden Turbulent Magnetic Flux”

[摘要] WepresentobservationsofmagneticfieldsoftheveryquietSunneardiskcenterusingtheSpectro-PolarimeteroftheSolarOpticalTelescopeaboardtheHinodesatellite.Theseobservationsrevealforthefirsttimetheubiquitouspresenceofhorizontalmagneticfieldsintheinternetworkregions.Thehorizontalfieldsarespatiallydistinctfromtheverticalfields,demonstratingthattheyarenotarisingmainlyfrombuffetingofverticalfluxtubesbythegranularconvection.Thehorizontalcomponenthasanaverage“apparentfluxdensity”of55 Mxcm$$^{-2}$$(assumingthehorizontalfieldstructuresarespatiallyresolved),incontrasttotheaverageapparentverticalfluxdensityof11 Mxcm$$^{-2}$$.Theverticalfieldsresidemainlyintheintergranularlanes,whereasthehorizontalfieldsoccurmainlyoverthebrightgranules,withapreferencetobeneartheoutsideedgeofthebrightgranules.Thelargeapparentimbalanceofverticalandhorizontalfluxdensitiesisdiscussed,andseveralscenariosarepresentedtoexplainthisimbalance.

[学科分类] 天文学(综合)

[关键词] internetwork;"quiet Sun";"Stokes polarimetry";"Sun: magnetic fields"