The dynamic evolutions of the generalized Hobbit model and structure formation

Autor: Huan Huan Fu, Ya Bo Wu, Ming Hui Fu, Fang Yuan Cheng
Rok vydání: 2008
Předmět:
Zdroj: General Relativity and Gravitation. 41:1677-1693
ISSN: 1572-9532
0001-7701
DOI: 10.1007/s10714-008-0737-y
Popis: In this paper a more general phenomenological model is proposed on the basis of the Hobbit model in Cardone et al. (Phys Rev D 69:083517, 2004). The main purpose of constructing our model is to make this model can not only mimic the ΛCDM model, but also describe a four-phase smooth transition of the universe, namely the inflationary phase, a radiation-dominated phase, a matter-dominated phase and a de Sitter-like phase. In order to check whether this model is a viable one, the evolutions of the universe are respectively discussed in the two cases, and the possible physical interpretations for this model are also respectively shown by using the scalar fields. Finally, the structure formations in our model are simply discussed for the both cases, and the results given by us reconfirm that our model can be regarded as a fit to the ΛCDM model, if we choose the proper conditions.
Databáze: OpenAIRE
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