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Hubble parameter measurement constraints on the cosmological deceleration-acceleration transition redshift

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arxiv 1301.5243 v1 pith:GGBZO5YY submitted 2013-01-22 astro-ph.CO

Omer Farooq , Bharat Ratra This is my paper
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keywords cosmologicalhubblemeasurementsredshiftsconstantconstraintsdeceleration-accelerationmodel
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abstract

We compile a list of 28 independent measurements of the Hubble parameter between redshifts 0.07 < z < 2.3 and use this to place constraints on model parameters of constant and time-evolving dark energy cosmologies. These H(z) measurements by themselves require a currently accelerating cosmological expansion at about, or better than, 3-sigma confidence. The mean and standard deviation of the 6 best-fit model deceleration-acceleration transition redshifts (for the 3 cosmological models and 2 Hubble constant priors we consider) is $z_{\rm da} = 0.74 \pm 0.05$, in good agreement with the recent Busca et al. (2012) determination of $z_{\rm da} = 0.82 \pm 0.08$ based on 11 H(z) measurements between redshifts 0.2 < z < 2.3, almost entirely from BAO-like data.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Do we really need alternatives to the $\omega_0\omega_a$CDM parameterization after the DESI DR2?

    astro-ph.CO 2026-08 conditional novelty 5.0 of 10

    In a common physically motivated pivot basis, the standard CPL parameterization is mildly preferred over the fafbCDM density expansion and reproduces quintessence backgrounds at least as well.

  2. New Agegraphic Dark Energy Driven Reconstruction of \boldmath{$f(Q)$} Gravity and its Cosmological Implications

    astro-ph.CO 2025-07 conditional novelty 5.0 of 10

    An f(Q) gravity function is derived by forcing its dark energy density to match New Agegraphic Dark Energy, and this NADE-equal-f(Q) model fits BAO data only marginally better than the standard model.

  3. Transit dark energy cosmological models in generalized matter-geometry coupling theory using a non-linear form of $f(R,T,L_{m})$ function

    gr-qc 2025-09 conditional novelty 4.0 of 10

    A modified f(R,T,L_m) gravity model, fitted to CC and Pantheon data, yields an accelerating late-time universe with transition redshift near 0.6 and an effective dark energy equation of state within 1e-5 of -1.

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