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1.
1 IntroductionTworeceiversystemhavebeenusedatTRAO (TaedukRadioAstronomyObservatory) .OneisSIS (SuperconductorInsulatorSuperconductor)receiverof 1 0 0GHzbandwiththefre quencyrangesof 85 1 1 5GHz〔1〕.TheotherisSchottkyreceiverof 1 5 0GHzbandwiththefre quencyrangesof 1 2 5 …  相似文献   

2.
1 IntroductionActivegalacticnuclei (AGNs)showbothshort term (Xieetal,1 994)andlong term(Tornikoskietal.1 994)variability .Sometimesthevariationsshowsignitureofperiod (Fanetal.1 998a)andtheknownperiodsofAGNsareofthesimilarvalueofabout 1 0 years(Fanetal.1 998b) .Manyperiodvar…  相似文献   

3.
StarPhysicsProgressintheStudyofAbundancesofHeavyElementsinMetal-PoorStarsZHOUGui-de ( 4) . 7……………………………………………………………………SolarPhysics RadioAstronomyTheDynamicalFeatureofFilamentsinAR750 0JIANGYun -chun ,LUANDi ( 1 ) . 1 8………SolarRadioMetricWaveEventsFromActiveRegion 653 8…  相似文献   

4.
1 IntroductionItisgenerallyacceptedthattherearemainlyfourkindsofstarsontheAGBphase:theMiravariables,theOH/IRstars,thecarbonstarsandtheintrinsicS -typestarswithTc (Iben&Renzini1 983,Jorissen&Mayor 1 992 ) .Incarbon -richstars,〔C/O〕 >1 ,ingeneral,SiCparti clesareformedw…  相似文献   

5.
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   

6.
BIRACisacooperationprojectbetweenBeijingAstronomicalObservatoryofChinaandNa tionalAstronomicalObservatoryofJapan .A 5 1 2× 5 1 2PtSiarrayisemployedinBIRAC .ACOGITOcontrollerdevelopdebyDr.Ueno’sgroupinTokyoUniversityisusednow .Now ,itisasimplecameraonly ,withoutc…  相似文献   

7.
1 IntroductionSiteselectionforoptical/infraredhasbeendoneinrecentfortyyearsinChina〔1〕.Inthelate19 80ssomemiddlesizeastronomicalequipments ,suchasa 2 .16mopticaltelescope ,a 13 .7mmil limeterwaveradiotelescope ,asolarmagneticfieldtelescope ,two 2 5mradiodishesforVLBIh…  相似文献   

8.
1 IntroductionLAMOSTisa 4maperture 5°FOVtelescope .Multi-objectlowresolutionspectroscopicob servationisitsmainworkingmode〔1〕 ,〔2〕.Therefore ,themostimportantinstrumentofLAMOSTisa 40 0 0objectspectroscopysystem .Thesystemisconsistentof 40 0 0independentfiberposition …  相似文献   

9.
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   

10.
1 IntroductionThe〔CII〕1 5 8μm ( 2 P3 /2 →2 P1/2 )emissionlineoftendominatesthegascoolingintheneu tralphaseofthegalacticISM (interstellarmedium) .ThislineiswellcorrelatedonagalacticscalewithFIR (far-infrared)continuum ,whichtracesthecoolingofdustgrains.Nearlyconstantin…  相似文献   

11.
1 IntroductionWeplantodevelopthedualchannelreceiver,whichisusedtomakethesimultaneousobser vationat 1 0 0GHzand 1 5 0GHzbands.TheSISmixersareusedfortwobands.Toconstructthedualchannelreceiversystem ,thequasiopticalsystemhastobeconsideredfirstofall.Thebeamfromthe…  相似文献   

12.
1 IntroductionPhysicalResearchLaboratory (PRL)AhmedabadoperatesanAstrophysicalObservatoryknownasMt.AbuInfraredObservatorylocatedonthetopofahill(Gurushikhar) .Theobserva toryisequippedwithseveralstate of the artback endequipmentslikeIRphotometer (InSbde tecto…  相似文献   

13.
OnJulyof1 998,NanjingAstronomicalInstrumentResearchCenter (NAIRC)ofChineseA cademyofSciences,hasprovidedaUniversalBirefringentFilter (UBF)toTokyoMeiseiUniver sitythroughNikonCorporationofJapan .1 Opticalscheme (Fig 1 )TheUBFiscomposedofsixtunableLyotelementsL1 L6,…  相似文献   

14.
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   

15.
1 IntroductionInourspectroscopicobservationoftheopticalidentificationofROSATX raysourcesinthehighgalacticlatitude ,8newcataclysmicvariableswerediscoveredbasedontheirspectralnature.PreliminarydiscusshadbeenreportedbyHuetal ( 1 998) .WehavemadeCCDtime resolvedp…  相似文献   

16.
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   

17.
1 IntroductionStarformationisoneofthemostexcitingfieldsofmodernastronomy .COmolecularout flowsnearyoungstellarobjectswerefirstdetectedinOrionregion (Kwanetal.1 976 ) .ThankstothelaunchingofIRAS (InfraredAstronomicalSatellite) ,theIRASpoint sourcecatalogue(PSC) p…  相似文献   

18.
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   

19.
1 IntroductionAfilter basedvectormagnetographisattachedtotheSolarFlareTelescope (Moonetal.1 996 ,Parketal.1 997)attheBohyunsanOpticalAstronomyObservatory (BOAO) ,WhichusedaverynarrowbandLyotfilterandKD Pcrystalsforpolarimetricobservations .TheStokespa rametersarem…  相似文献   

20.
1 IntroductionInordertoenhancetheobservingcapabilityofthe 1 88cmreflectorofOkayamaAstrophysicalObservatory (OAO) ,ahighdispersionechellespectrographforthecoud啨focushasbeenselectedasthenextgenerationinstrument.Itsconstructionstartedin 1 997andisnownearcompleti…  相似文献   

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