期刊
PHYSICAL REVIEW D
卷 99, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.043543
关键词
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资金
- National Natural Science Foundation of China [11705079, 11647153]
- Faculty Research and Professional Development Fund (FRPDF) Scheme of Presidency University, Kolkata, India
- European Research Council [681431]
- Mathematical Research Impact Centric Support (MATRICS) [MTR/2017/000407]
- CANTATA COST (European Cooperation in Science and Technology) action [CA15117]
The phenomenological parametrizations of dark-energy (DE) equations of state can be very helpful, since they allow for the investigation of its cosmological behavior despite the fact that its underlying theory is unknown. However, although there has been a large amount of research on DE parametrizations which involve two or more free parameters, the one-parameter parametrizations seem to be underestimated. We perform a detailed observational confrontation of five one-parameter DE models, with observational data from cosmic microwave background (CMB), Joint light-curve analysis sample from Supernovae Type Ia observations (JLA), baryon acoustic oscillations (BAO) distance measurements, and cosmic chronometers (CC). We find that all models favor a phantom DE equation of state at present time, while they lead to H-0 values in perfect agreement with its direct measurements and therefore they offer an alleviation to the H-0-tension. Finally, performing a Bayesian analysis we show that although Lambda CDM cosmology is still favored, one-parameter DE models have similar or better efficiency in fitting the data comparing to two-parameter DE parametrizations, and thus they deserve a thorough investigation.
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