Umbral Fine Structures in Sunspots Observed with Hinode Solar Optical Telescope
[摘要] AhighresolutionimagingobservationofasunspotumbrawasmadewiththeHinodeSolarOpticalTelescope.Filtergramsatwavelengthsoftheblueandgreencontinuaweretakenduringthreeconsecutivedays.Theumbraconsistedofadarkcoreregion,severaldiffusecomponents,andnumerousumbraldots.Wederivedbasicpropertiesofumbraldots(UDs),especiallytheirtemperatures,lifetimes,propermotions,spatialdistribution,andmorphologicalevolution.ThebrightnessofUDsisconfirmedtodependonthebrightnessoftheirsurroundingbackground.SeveralUDsshowfissionandfusion.Thankstothestableconditionofthespaceobservation,wecouldforthefirsttimefollowthetemporalbehavioroftheseevents.Thederivedpropertiesoftheinternalstructureoftheumbraarediscussedfromtheviewpointofmagnetoconvectioninastrongmagneticfield.
[发布日期] [发布机构]
[效力级别] [学科分类] 天文学(综合)
[关键词] "Sun: magnetoconvection";sunspots;"Sun: umbral dots" [时效性]
