Cosmic age test in inhomogeneous cosmological models mimicking $Λ$CDM on the light cone

Details Cosmic age test in inhomogeneous cosmological models mimicking $Λ$CDM on the light cone Cosmic age test in inhomogeneous cosmological models mimicking $Λ$CDM on the light cone

2010-02-04

arxiv.org/abs/1002.0978v3

Phys.Rev.D82:023516,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6 pages, 1 figures

Scientific paper

10.1103/PhysRevD.82.023516

The possibility of reconstructing a spherically symmetric inhomogeneous Lemaitre-Tolman-Bondi (LTB) model with $\Lambda$CDM observations has drawn a lot of attention. Recently, a LTB model having the same luminosity-distance and light-cone mass density as the $\Lambda$CDM model was reconstructed. We calculate the cosmic age at our position in this model, and get the age $t_{LTB}<11.7$Gyr in 2$\sigma$ confidence level from the Seven-Year WMAP observations. This result is inconsistent with some Milky Way observations.

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