Spherical Collapse of a Unified Dark Fluid with Constant Adiabatic Sound Speed

Abstract

In this paper, we test the spherical collapse of a unified dark fluid (UDF) which has constant adiabatic sound speed. By choosing the different values of model parameters $B_s$ and $\alpha$, we show the nonlinear collapse for UDF and baryons which are considered for their formation of the large scale structure of our Universe. The analyzed results show that larger values of $\alpha$ and $B_s$ make the structure formation faster and earlier.

5 pages, 4 figures, accepted for publication in Eur. Phys. J. C

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