2011/12/31 by Tomasz Denkiewicz
Physics and Astronomy · #Astrophysics #Baryon acoustic oscillations #Big Rip #Black Holes and Theoretical Physics #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #De Sitter universe #Galaxies: Formation, Evolution, Phenomena #Geometry #Gravitational singularity #Mathematical physics #Metric expansion of space #Physics #Quantum mechanics #Scale factor (cosmology) #Sigma #Singularity #Supernova #Theoretical physics #Universe #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1088/1475-7516/2012/07/036
6 pages, some misprints corrected
arxiv created 2012/06/27 · openalex publication_date 2012/07/18 · arxiv updated 2012/07/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss the combined constraints on a Finite Scale Factor Singularity (FSF) universe evolution scenario, which come from the shift parameter ℛ, baryon acoustic oscillations (BAO) 𝒜, and from the type Ia supernovae. We show that observations allow existence of such singularities in the 2 × 10 9 years in future (at 1σ CL) which is much farther than a Sudden Future Singularity (SFS), and that at the present moment of the cosmic evolution, one cannot differentiate between cosmological scenario which allow finite scale factor singularities and the standard ΛCDM dark energy models. We also show that there is an allowed value of m = 2/3 within 1σ CL, which corresponds to a dust-filled Einstein-de-Sitter universe limit of the early time evolution and so it is pasted into a standard early-time scenario.