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Devi Y.
Constraining parameters for the accelerating universe in f(R, Lm) Gravity / Devi Y., Narawade S. A., Mishra B. - Текст на англ. языке // Физические интерпретации теории относительности, Международная научная конференция 24-я, Москва, 7 - 10 июля 2025 г. = Physical Interpretations of Relativity Theory (PIRT–2025) : сборник тезисов / МГТУ им. Н. Э. Баумана. - М., 2025. -
An accelerating cosmological model is developed within the framework of f(R, Lm) gravity, incorporating a functional form inspired by the Starobinsky model and power-law matter coupling [1, 2]. The field equations for a flat FLRW Universe are derived, and the Hubble parameter is constrained using Hubble and Pantheon+ datasets via MCMC simulation. Observational data yield q₀ ≈ –0.63, indicating a late-time accelerating Universe with a transition redshift z ≈ 0.7. The present values of the jerk and snap parameters are j₀ ≈ 0.78 and s₀ ≈ 0.1, respectively, suggesting a quintessence phase. Diagnostic tests, including state-finder and Om(z), affirm the model's convergence towards ΛCDM. The age of the Universe is computed as t₀ = 13.64 Gyr, in good agreement with Planck results [3]. The analysis supports f(R, Lm) gravity as a viable alternative to study dark energy dynamics.
