Solar energy paper index
Unifying the Dark Sector with the New Generalized Chaplygin Gas: Observational Constraints
One-line summary
A solar energy research paper on Unifying the Dark Sector with the New Generalized Chaplygin Gas: Observational Constraints.
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Chinese explanation / 中文解读
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Original abstract
In light of recent cosmological observations, we examine a generalized Chaplygin gas model with a redshift-dependent exponent as a framework for describing the dark energy and dark matter content of the Universe. Specifically, we treat this fluid as a single unified component and test it against late-time background observational data. We employ Type Ia supernova data, cosmic chronometers, and baryon acoustic oscillations from the second data release of the Dark Energy Spectroscopic Instrument. We perform a Bayesian analysis for parameter estimation and compare the model with $Λ$CDM. We find that the generalized Chaplygin gas provides systematically higher values of the combined likelihood; nevertheless, once the larger number of free parameters is taken into account, both the Bayesian evidence and the Akaike Information Criterion suggest that the model is statistically indistinguishable from $Λ$CDM.
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