Large-scale structure in superfluid Chaplygin gas cosmology

Abstract

We investigate the growth of large-scale structure in the superfluid Chaplygin gas (SCG) model. Both linear and non-linear growth, such as ${\sigma }_8$ and the skewness $S_3$, are discussed. We find the growth factor of SCG reduces to the EdS case at early times while differs from the $\Lambda$CDM case in the large $a$ limit. We also find there will be much stricture growth on large scales in the SCG scenario than in $\Lambda$CDM and the variations of ${\sigma }_8$ and $S_3$ between SCG and $\Lambda$CDM can not be discriminated.

10 pages, 6 figures, minor errors are corrected

References in corpus (2)

• Structure formation in the presence of dark energy perturbations
• First cosmological constraints on the Superfluid Chaplygin gas model

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