Inferring dark energy properties from the scale factor parametrization
Jul 15, 20248 pages
Published in:
- Phys.Rev.D 110 (2024) 12, 123516
- Published: Dec 11, 2024
e-Print:
- 2407.10845 [astro-ph.CO]
DOI:
- 10.1103/PhysRevD.110.123516 (publication)
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Abstract: (APS)
We propose and implement a novel test to assess deviations from well-established concordance cosmology while inferring dark energy properties. In contrast to the commonly implemented parametric forms of the dark energy equation-of-state (EoS), we test the validity of the cosmological constant on the more fundamental scale factor [] which determines the expansion rate of the Universe. We constrain our extended “general model” using the late-time observables. The posterior of the dark energy EoS is mainly constrained to be quintessencelike naturally excluding physically unviable regions such as phantom crossings or exponential growth.Note:
- 8 Pages, 6 figures. Agrees with the published version (Dated:11/12/24). Comments are welcome
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Figures(6)
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