AGASAResults：阿嘉莎的结果

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1、TheHighestEnergyCosmicRaysandTheirSources21–23May,2004@INRMoscowOutline•Physicsmotivation•ActivitiesatAkenoObservatory•Energydetermination&spectrum–Showerproperties&analysis–Systematicerrorinenergyestimation–Comparisonwithotherresults(HiRes&A1)•Muoncomponent&chemicalcompositio

2、n–Gamma-rayshowerproperties–Chemicalcomposition&gamma-rayfluxlimitestimation•Summary&outlookPhysicsmotivation•Understandingnature&originofUHECRs(>1019eV)–Energyspectrum–Arrivaldirectiondistribution–Chemicalcomposition•SuperGZKparticlesincl.highestenergycosmicrays(>1020eV)–Bott

3、om-upscenarios•AGNs/GRBs/Galacticclustersetc.⇒Hadronicprimariespredicted–Top-Downscenarios•Topologicaldefects•Superheavydarkmatter•Z-burst⇒Gamma-ray+nucleon1riespredictedpUHECRγCMB→Nπ+•Sourcelocationstillnotidentified,(E0~5x1019eV)…..but…..Arrivaldirectiondistribution(>4x1019e

4、V;θ<50º):4x1019–1020eV:>1020eV•Smallscaleanisotropy–Eventclustering(>4x1019eVwithin2.5º)6doublets(○)&1triplet(○)observed•Againstexpected2.0doublets(Pch<0.1%)•Theremustbe~250EHECRsources(185–340)SpaceangledistributionofeventsLogE>19.0LogE>19.63.4σ4.4σ•Significantpeak@0degree–im

5、plyingpresenceofcompactEHECRsourcesAGASACollaboratorsJapan•InstituteforCosmicRayResearch,•RIKEN(Wako)UniversityofTokyo(Kashiwa)–YoshiyaKawasaki,NaotoSakaki,–MasakiFukushima,NaoakiHayashida,HirohikoM.ShimizuHideyukiOhoka,SatokoOsone,•EhimeUniversity(Matsuyama)MakotoSasaki,Masah

6、iroTakeda,ReikoTorii–SatokoMizobuchi,HisashiYoshi•KinkiUniversity(Osaka)•FukukiUniversityofTechnology(Fukui)–MichiyukiChikawa–MotohikoNagano•UniversityofYamanashi(Kofu)•CommunicationResearchLaboratory(Tokyo)–KenHonda,NorioKawasumi,–MasahikoSasanoItsuroTsushima•NationalInstitut

7、eofRadiologicalSciences(Chiba)•SaitamaUniversity(Saitama)–YukioUchihori–NaoyaInoue•MusashiInstituteofTechnology(Tokyo)•ChibaUniversity(Chiba)–KenjiKadota–NobuyukiSakurai,ShigeruYoshida•TokyoInstituteofTechnology(Tokyo)FederalRepublicofGermany–FumioKakimoto•Max-Planck-Institute

8、forPhysics(Munich)•NishinaMemorialFundation(Tokyo)–KenjiShino