English

Coincidence of Universe age in $\Lambda$CDM and Milne cosmologies

Astrophysics 2007-05-23 v2

Abstract

The age of the Universe in the Λ\LambdaCDM cosmology with Ωmatter=0.26\Omega_{matter}=0.26 and ΩΛ=0.74\Omega_{\Lambda}=0.74 is the same as in the Milne cosmology which correspods to an almost empty universe. In both cases it is a reciprocal Hubble constant, 1/H01/H_0, that for now preferred value H0=71km/s/MpcH_0=71 km/s/Mpc is 13.7 billion years. The most curious coincidence is that at the present time, in the Λ\LambdaCDM model the decelerated expansion is exactly compensated by the accelerated expansion, as if the Universe coast for 13.7 billion years.

Keywords

Cite

@article{arxiv.astro-ph/0605175,
  title  = {Coincidence of Universe age in $\Lambda$CDM and Milne cosmologies},
  author = {M. Kutschera and M. Dyrda},
  journal= {arXiv preprint arXiv:astro-ph/0605175},
  year   = {2007}
}

Comments

2 pages, 1 figure, to apear in Acta Physica Polonica B