24714.關(guān)于廣義hobbit模型的理論研究

1、遼寧師范大學(xué)碩士學(xué)位論文關(guān)于廣義Hobbit模型的理論研究姓名：孫小雨申請學(xué)位級別：碩士專業(yè)：理論物理指導(dǎo)教師：吳亞波201204關(guān)于廣義Hobbit模型的理論研究AstudyofthegeneralizedHobbitmodelAbstractAtpresent，theanalysisofalargenumberofastronomicalobservationdata(TypeIasupernovaeandtheWMAP)makes

2、peoplegraduallyfoundthattheuniverseisacceleratingexpansionThengivenareasonableexplanationofcosmicaccelerationisimperativeThisrequiresUStomakeamendsforthehotbigbangcosmologicalmodelthere：aretwoimportantcorrectionmethods，o

3、neisthedarkenergytheoryAssumingthatthereisanewmaterialcompositionexistintheuniverse，thepressureisnegativeanduniformlydistributedinthelargescalestructure，thereforeoffsetingthegravitationaleffectbecauseofitprovideseliminat

4、eeffectSo，theuniverseisacceleratingexpansion，thissubstanceisnamedforthedarkenergyThesecondistOmodifiedtheleftsideoftheEinsteingravitationalfieldequation，thespace—timegeometrypart，wecallitthemodifiedtheoriesofgravityRecen

5、tly，VFCardonewhounifiedphenomenologymodeltoexplaintheacceleratedexpansionoftheuniverseputsfolveardamodelofphenomenologytheSO—calledHobbitmodelAfterthismodelhasbeenfurtherdevelopment，makeitsCandescribefourevolutionarystag

6、eswithinflationoftheuniverse，namelythegeneralizedHobbitmodel，andthemodelwhichinamatterdominatedphaseitsevolutionsimilartOtheACDMmodelInthisarticleweconcludeditsstructureformationproblemsandstabilityproblemswithinteractio

7、nFindingsthatitisfitstotheACDMmodelandobservationalfactsforthestructureformationproblems，but，thestabilityproblemsisnotAsexpected，wefindthatwhenthereistheinteractionbetweenthebarotropicbackgroundfluidandthegeneralizedHobb