共查询到20条相似文献,搜索用时 15 毫秒
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1 ObservationalvelocityfieldWeanalyseHβspectraobtainedatYunnanObservatorywiththetwo dimensionMulti Wave bandSpectra SpectroHelioGraph (MW SSHG) (XuanandLin 1 993) .ThePFLsappearedat0 1 :0 4UTofAugust 1 7,1 989onthewesternsolarlimbabovethelargeactiveregion (AR 5 6 2 9,S1 5°;W 1 … 相似文献
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《天文研究与技术》1999,(Z1)
1 IntroductionIRAS 0 331 3 6 0 5 8wasclassifiedasacandidateextremecarbonstarbasedonthesimilarityofitsIRASLRSspectrumtothoseofAFGL 30 6 8andIRC 1 0 2 1 6 (Volketal.1 992 ) .IthasnoopticalcounterpartinthePOSSplates (Jiang&Hu 1 992 ) .Inthenearinfrared ,thesourcewasdetectedatK =1 5 6… 相似文献
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《天文研究与技术》1999,(Z1)
1 IntroductionAnextralargeTypeⅣmicrowaveburstwasobservedwithPhoenixⅡMicrowaveSpec trometer ( 4 0 0GHz ,2 84GHzand 1 42GHz)atYunnanObservatoryfrom 0 8h31 mto 0 9h41 mUTonDecember 1 6 ,1 988.Inthemorethan 70minutes ,fiveintensivemainpeaksweregener atedontheType Ⅳμburstonthreewa… 相似文献
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Liu W Hu J. Y. Beijing Astronomical Observatory National Astronomical Observatories The Chinese Academy of Sciences Beijing China Email: liuwu@class. bao. ac. cn 《天文研究与技术》1999,(Z1)
1 IntroductionInourspectroscopicobservationoftheopticalidentificationofROSATX raysourcesinthehighgalacticlatitude ,8newcataclysmicvariableswerediscoveredbasedontheirspectralnature.PreliminarydiscusshadbeenreportedbyHuetal ( 1 998) .WehavemadeCCDtime resolvedp… 相似文献
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《天文研究与技术》1999,(Z1)
1 IntroductionDuringtheROSATAll-SkySurvey (RASS)about 80 ,0 0 0X -raysourceswithadetectionlikelihood≥ 1 0werefound (Vogesetal.1 996 ) ,fromwhich 1 8,81 1sourceswerecompiledintheROSATBrightSourceCatalogue (RASS -BSC) (Vogesetal.1 996 ;) .OfRASSsourcesmorethan 6 5 %oftheobjectswerepre… 相似文献
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1 IntroductionStarformationisoneofthemostexcitingfieldsofmodernastronomy .COmolecularout flowsnearyoungstellarobjectswerefirstdetectedinOrionregion (Kwanetal.1 976 ) .ThankstothelaunchingofIRAS (InfraredAstronomicalSatellite) ,theIRASpoint sourcecatalogue(PSC) p… 相似文献
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《天文研究与技术》1999,(Z1)
1 IntroductionArarelargeTypeⅣmicrowaveburstwasobservedatYunnanobservatorywithPhoenixⅡMicrowaveSpectrometeratthreefrequencies ( 1 42 ,2 84and 4 0 0GHz)from 0 8h31 mto 0 9h41 mUTonDecember 1 6 ,1 988.ThisrarelargeTypeⅣμburstappearedovertheactiveregionNOAA/USAF 5 2 78,comingfroma… 相似文献
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