http://arxiv.org/abs/1907.11101
In this short paper we determine the effects of structure on the cosmological consistency relation which is valid in a perfect Friedmann Universe. We show that within $\Lambda$CDM the consistency relation is violated by about 1% for redshifts $z\simeq 2$ and this violation raises up to about 2% at $z\simeq 5\div 10$ after which it saturates. This effect of cosmic structure on the distance redshift relation also very sensitively perturbs the determination of the dark energy equation of state via cosmic distances. It actually leads to a quite unphysical behavior of this $w(z)$ which even diverges at $z\sim3$ and which we also discuss here.
V. Rustagi and R. Durrer
Fri, 26 Jul 19
1/84
Comments: 9 pages, 3 figures
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