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利用LHAASO和Fermi-LAT研究天体物理中的高能伽马射线辐射.docx

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利用LHAASO和Fermi-LAT研究天体物理中的高能伽马射线辐射 Title:ExploringHigh-EnergyGamma-RayEmissioninAstrophysicsthroughLHAASOandFermi-LAT Abstract: Thestudyofhigh-energygamma-rayradiationinastrophysicshasopenedanewwindowforunderstandingthemostextremeandenergeticphenomenaintheUniverse.Thispaperaimstoexploretheadvancementsmadeinthisfieldthroughthecombinationoftwoground-breakingexperiments,theLargeHighAltitudeAirShowerObservatory(LHAASO)andtheFermiGamma-raySpaceTelescope(Fermi-LAT).Byutilizingthedatacollectedbytheseinstruments,significantprogresshasbeenachievedinourunderstandingofhigh-energygamma-raysources,includingactivegalacticnuclei(AGNs),gamma-raybursts(GRBs),andpulsars. 1.Introduction: High-energygamma-rayradiationoriginatesfromthemostenergeticprocessesintheUniverse,providingcrucialinformationaboutthephysicsofextremeenvironments.TheLHAASOandFermi-LATexperimentshavemadesignificantcontributionstothisfieldbysurveyingthegamma-rayskywithunprecedentedprecisionandsensitivity. 2.TheLargeHighAltitudeAirShowerObservatory(LHAASO): TheLHAASOexperiment,locatedinDaocheng,China,consistsofanarrayofwaterCherenkovdetectorsandanelectromagneticparticledetector.ThewaterCherenkovdetectorsareusedtomeasurethepropertiesofextensiveairshowersgeneratedbyhigh-energycosmicraysorgammaraysenteringtheEarth'satmosphere.ThisinnovativesetupallowsforthedetectionofgammarayswithenergiesuptothePeVrange. 3.TheFermiGamma-raySpaceTelescope(Fermi-LAT): Fermi-LATisaspace-basedexperimentthatdetectshigh-energygammaraysintheenergyrangefrom20MeVtoover300GeV.Itoperatesontheprincipleofpair-conversion,wheregammaraysproduceelectron-positronpairsinadetectorcalledthetracker.TheFermi-LAThasprovidedremarkableinsightsintothehigh-energygamma-rayuniversethroughitsall-skysurveysandtargetedobservations. 4.ActiveGalacticNuclei(AGNs): AGNsareamongthemostpowerfulsourcesofhigh-energygammaraysintheUniverse.LHAASOandFermi-LAThavecontributedtoidentifyingandcharacterizingseveralAGNsemittinggammarayswithenergiesexceeding100GeV.Thecombineddatafromthesee