Is a non-vanishing cosmological constant really needed?

2009/11/06 by Julio A. Gonzalo, Gonzalo, Julio A.
Physics and Astronomy · #FOS: Physical sciences #General Physics (physics.gen-ph) #physics.gen-ph

paper · pdf · doi:10.48550/arxiv.0911.1278

arxiv created 2009/11/06 · arxiv updated 2009/12/01

Abstract

Using consistenly the compact Friedmann-Lemaitre solutions for an open (k=-0.580) universe with zero cosmological constant (Λ= 0) we show that the oberved apparent accelerated expansion is compatible with a time dependent Hubble parameter H=R/R equal to H=87.95 km/s/Mpc at t=10.39 Gys, H₀=67.9 ± 4 km/s/Mpc at t_o=13.7 ± 0.2 Gyrs (present), H=61.4 km/s/Mpc at t=15 Gyrs and with an apparent global flatness given by 1=Ω_m+Ω_r+Ω_k at all times which, properly averaged from galaxy formation times to present, gives <Ω_m>=0.272, <Ω_r>=0.005, <Ω_k>=0.728. Therefore, no cosmological constant is needed.

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