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Cosmic slowing down of acceleration for several dark energy parametrizations

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arxiv 1407.1632 v2 pith:M3BOD3L4 submitted 2014-07-07 astro-ph.CO gr-qc

Juan Magaña , Víctor H. Cárdenas , V. Motta This is my paper · ORCID
classification astro-ph.COgr-qc
keywords dataredshiftsupernovaeaccelerationcosmicdarkdecelerationdown
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We further investigate slowing down of acceleration of the universe scenario for five parametrizations of the equation of state of dark energy using four sets of supernovae data. In a maximal probability analysis we also use the baryon acoustic oscillation and cosmic microwave background observations. We found the low redshift transition of the deceleration parameter appears, independently of the parametrization, using supernovae data alone except for the Union 2.1 sample. This feature disappears once we combine the supernova data with high redshift data. We conclude that the rapid variation of the deceleration parameter is independent of the parametrization. We also found more evidence for a tension among the supernovae samples, as well as for the low and high redshift 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. Evolution of matter perturbations in the context of cosmic slowing down

    gr-qc 2026-08 conditional novelty 4.0 of 10

    For five phantom-capable dark-energy parameterizations, the growth index at redshift zero is about 0.54 with a negative slope, and the f-sigma-8 combination lies below the Lambda-CDM prediction over most of the redshi...

  2. An overview of what current data can (and cannot yet) say about evolving dark energy

    astro-ph.CO 2025-02 conditional novelty 4.0 of 10

    The apparent preference for evolving dark energy depends strongly on which supernova catalog and which BAO survey are used, and is not robust across all independent data combinations.

  3. Cosmological implications of Bumblebee theory on an FLRW background

    gr-qc 2025-12 unverdicted novelty 3.0 of 10

    Bumblebee theory on an FLRW background yields a cosmological model whose single free parameter is fitted to supernovae observations, producing deceleration and dark energy behaviors that are compared to Lambda-CDM.

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