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Open AccessArticle10.22323/1.081.0047

New developments on structure formation in Chaplygin gas cosmological models

Sandro Silva e Costa,Marceliano Eduardo de Oliveira-2009-12-14
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TL;DRAbstract

In this work we show that the use of a cosmological model with a non-linear equation of state can produce a universe with expansion, and in such context we examine the structure formation in Chaplygin gas cosmological models. Our focus is on the new modified Chaplygin gas model, which can present exact analytical solutions for the density contrast and for the power spectrum for some particular values of its parameters.

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In this work we show that the use of a cosmological model with a non-linear equation of state can produce a universe with expansion, and in such context we examine the structure formation in Chaplygin gas cosmological models. Our focus is on the new modified Chaplygin gas model, which can present exact analytical solutions for the density contrast and for the power spectrum for some particular values of its parameters.

Keywords

Chaplygin gasPhysicsContext (archaeology)Equation of stateStructure formationFocus (optics)Work (physics)Metric expansion of space

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