中子星的磁場研究.pdf

1、V7750337f大學碩士學位論文題目主至曼煎蕉垣盟窺作者熹瘩惑完成日期2QQ』生!旦旦培養(yǎng)單位物理科學與工程技術學院指導教師呂曉夫教授昊小華教授專業(yè)研究方向授予學位日期理論物理粒子物理年月日AbstraetArealneutronstarmodelhadbeenestablishedin1939，anditsdiscoverywasuntil1967Theneutronstarhasasmallradiusabout10km，andi

2、tsmassisaboutoneunitmassofsunThesemakethesocompact，andhavemadeourresearchsohardForonething，itisn’teasytobeobservedforastarwhichistitleandfarfromearthAfterthediscovery40yearspassed，westillknowlittleaboutitsstructureorcomp

3、ositionSomepresumetheneutronstarmusthavehyperonandFcondensateinitscore，whilesomeothersconsiderthmthereisno“neutronstar”bma‘‘quarkstar”Foranother，theneutronstarhasadensityhighaboveinnuclei，andwehavenoexperimentinsuchadens

4、itysotherelativisticquantumfieldtheoryofmanybodiesneedstobeconsideredForthecomplexitiesofthisproblemanditsdifficultiesinmathematicalcomputations，someapproximationsareneededThesystematicmethodiscalledtherelativisticmeanfi

5、eldapproximation(RMA)ThemainideaoftheRMAis：theattractionandrepulsionbetweennucleiareviatheexchangesofmesons；themesonfieldscanbesubstitutedbytheirexpectationvaluesundergroundstatewhilecomputeTheRMAtheoryhadbeenproposedin7

6、0oflastcenturyVia30years’development，thismethodhasbecomearelativelycompletedtheoryandithasbeingusedinmanyfields，suchasinnuclearphysicsandcelestialphysicsInthispaperwewilluseittocomputethemagneticfieldsinneutronstarLargem

7、agneticfieldsB=10“～1014Ghavebeenassociatedwiththesurfacesofneutronstars，whiletheinteriorfieldcouldheashighas10”GSuchastrangepropertyhasattractedthescientists’attentionsHoweverbecausethestructureandcompositionofthiscompac

8、tstarstillareunclearthestudiesaresodifticultBesides，usingtheeffectiveLagrangianmethod，wemeetanotherproblem：photonismassless，anditseffectmaybecanceledbytheRMAForthisreason，someauthorshadtotakemagneticfieldasexternalAresen