Calculating the Hubble diagram by perturbation theory

Details Calculating the Hubble diagram by perturbation theory Calculating the Hubble diagram by perturbation theory

2010-02-24

arxiv.org/abs/1002.4605v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Scientific paper

The effect of density fluctuations upon light propagation is calculated perturbatively in a matter dominated irrotational universe. The starting point is the perturbed metric (second order in the perturbation strength), while the output is the Hubble diagram. Density fluctuations cause this diagram to broaden to a strip. Moreover, the shift of the diagram mimics accelerated expansion.

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