Can Early Dark Energy be Detected in Non-Linear Structure?

Details Can Early Dark Energy be Detected in Non-Linear Structure? Can Early Dark Energy be Detected in Non-Linear Structure?

2008-08-21

arxiv.org/abs/0808.2840v2

Mon.Not.Roy.Astron.Soc.394:605-614,2008

Astronomy and Astrophysics

Astrophysics

11 pages, 19 figures. Minor changes to match version accepted to MNRAS

Scientific paper

10.1111/j.1365-2966.2008.14286.x

We present the first study of early dark energy cosmologies using N-body simulations to investigate the formation of non-linear structure. In contrast to expectations from semi-analytic approaches, we find that early dark energy does not imprint a unique signature on the statistics of non-linear structures. Investigating the non-linear power spectra and halo mass functions, we show that universal mass functions hold for early dark energy, making its presence difficult to distinguish from $\Lambda$CDM. Since early dark energy biases the baryon acoustic oscillation scale, the lack of discriminating power is problematic.

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