Cluster gas fractions and Pantheon+ supernovae support constant speed of light under CLASH and CCCP mass calibrations but indicate 2σ tension under Planck calibration.
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Exponential quintessence model is fitted to BAO, cosmic chronometers, and DES-SN5YR/Pantheon+ data, yielding parameter bounds and diagnostics statistically comparable to LCDM.
citing papers explorer
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Revisiting the Constancy of the Speed of Light: Galaxy Cluster Mass Bias Implications
Cluster gas fractions and Pantheon+ supernovae support constant speed of light under CLASH and CCCP mass calibrations but indicate 2σ tension under Planck calibration.
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Cosmological Dynamics of Exponential Quintessence Constrained by BAO, Cosmic Chronometers, and DES-SN5YR/Pantheon+ Data
Exponential quintessence model is fitted to BAO, cosmic chronometers, and DES-SN5YR/Pantheon+ data, yielding parameter bounds and diagnostics statistically comparable to LCDM.