PINN-based joint reconstruction of H(z) and fσ8(z) coupled through the GR growth equation recovers the input H0 prior exactly, yields fσ8(z) below ΛCDM at all redshifts, and shows Om(z) departure from flat ΛCDM at low z.
The Astrophysical Journal , abstract =
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Bayesian photometric cosmic chronometer analysis on VIPERS PDR2 data yields H(z=0.65)=93.68±28.27(stat)±10.67(syst) km/s/Mpc, consistent with spectroscopic CC results and Planck ΛCDM, as a proof of concept for photometric surveys.
Fractional entropy on the apparent horizon yields stable modified cosmology that fits late-time data best at α near 2, shifting H0 upward as α decreases.
A new q(z) model with radiative term fits CC, SNIa, HIIG and QSO data to indicate reduced late-time acceleration and earlier transition than LambdaCDM.
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Joint reconstruction of $H(z)$ and $f\sigma_8(z)$ with physics informed neural networks
PINN-based joint reconstruction of H(z) and fσ8(z) coupled through the GR growth equation recovers the input H0 prior exactly, yields fσ8(z) below ΛCDM at all redshifts, and shows Om(z) departure from flat ΛCDM at low z.
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Towards Bayesian Photometric Cosmic Chronometers: Application to VIPERS
Bayesian photometric cosmic chronometer analysis on VIPERS PDR2 data yields H(z=0.65)=93.68±28.27(stat)±10.67(syst) km/s/Mpc, consistent with spectroscopic CC results and Planck ΛCDM, as a proof of concept for photometric surveys.
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Thermodynamic behavior of cosmological models with fractional entropy
Fractional entropy on the apparent horizon yields stable modified cosmology that fits late-time data best at α near 2, shifting H0 upward as α decreases.
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Reconstructing the cosmic expansion with a generalized q(z) parameterization: A decelerating Universe from late-time constraints
A new q(z) model with radiative term fits CC, SNIa, HIIG and QSO data to indicate reduced late-time acceleration and earlier transition than LambdaCDM.