27994.暗能量模型及其分析與比較

1、學(xué)位論文獨(dú)創(chuàng)性聲明本人鄭重聲明：所提交的論文是本人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作和取得的研究成果。本論文中除引文外，所有實(shí)驗(yàn)、數(shù)據(jù)和有關(guān)材料均是真實(shí)的。本論文中除引文和致謝的內(nèi)容外，不包含其他人或其它機(jī)構(gòu)己經(jīng)發(fā)表或撰寫過的研究成果。其他同志對(duì)本研究所做的貢獻(xiàn)均已在論文中作了聲明并表示了謝意。學(xué)位論文作者簽名：日期：加II’J、矽，一／學(xué)位論文使用授權(quán)聲明研究生在校攻讀學(xué)位期間論文工作的知識(shí)產(chǎn)權(quán)單位屬南京師范大學(xué)。學(xué)校有權(quán)保存本學(xué)位論文的電子

2、和紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容，可以采用影印、復(fù)印等手段保存、匯編本學(xué)位論文。學(xué)?？梢韵驀矣嘘P(guān)機(jī)關(guān)或機(jī)構(gòu)送交論文的電子和紙質(zhì)文檔，允許論文被查閱和借閱。(保密論文在解密后遵守此規(guī)定)保密論文注釋：本學(xué)位論文屬于保密論文，保密期限為年。學(xué)位論文作者簽名：彭竅日期：溯1膨指導(dǎo)教師簽名：【J孕瓜己日期：抄t(、r西▲蠆一IepAbstractAbstractAstronomyinthelastcenturyhasa

3、chievedgreatprogressFromAlbertEinsteinpioposedGeneralRelativityandappliedittOthecosrmlogytOHubblefoundcosmicexpamionGamowproposedthebigbangtheoryWilsonandPenziasfoundthecosmicmicrowavebackgroundradiationthenin1998，twosup

4、ernovagroupfoundtheaccelerationoftheuniverse’Sexpansiondarkenergywhoaccountsfor73percentofthetotalenergyofthecosrl_10S，immediatelybecameahotspotandfocusedthecosmologicalresearchBeginningwithbackgroundknowled嬰oftheunivers

5、eacceleratingexpansiondarkenergyandtypeIasupernovae，wemainlyintroducethecosmologicalconstantmodelhobgraphicdarkenergymodelandseveralkindsofchssicdynamicdarkenergymodelssuchasQuintessence，Phantom，QuintomTachyonChaplyginGa

6、s，andqualitativelyanalyzetheadvantagesanddisadvanta籮sofvariousmodelsThecosmologicalconstantrmdelthoughfonmllystraightforward，andconsistentwiththeobservationverywell，butbeingaslightblenaisktherestillexistsbothfinetunningp

7、roblemandcoincidenceproblemTiestateequationofQuintessence，darkenergybeingdifferfiomthestateequationofcoslmlogicalconstantmodelwhichisaconstant，isvariablebetweentheintervalof(1，1)AndinthislmdeLthereisnotcoincidenceproblem

8、PhantomdarkenergymodeliSsimilartoQuintessenee，butitsolvestheshortcomingsthatthestateequationmaytraversethrough1，whichcanleadtotheBigR諂QuintomdarkenergylmdelisthesynthsisofQuintessenceandPhantomitsimultaneottslypossessess

9、on℃propertiesofbothtwokindsofmodelsHobgraphicdarkenergymodelwhosestateequationonlycontainsOlleparameterCandcancanchangenearby—l，isbasedontheholographicprincipleofquantummechanicsBecameofthevarietyofpresentdarkenergymodel

10、s，weurgentlyneedtOfindamethodtOidentifyandanalyzethemodelsStatefinderissuchakindofmethodByintroducingtheSmtefmderparametersonr，s，thebasicideaofStatefinderis幻contractthedistanceinSrplanebetweendarkenerLrymodelsandthefixed

11、pointO，1ieACDMlmdelUsingthislmthod，ChaplyginGasandHolographicdarkenergymodelsare鋤lysiSedandcompared，S—rrelationsofModifiedChaplyginGasdarkenergymodelandGeneralizedGasChaplygindarkenergymodelwithdustwerede印lystudied，andth