3 papers
astro-ph.CO2025
Unified dark fluid with null sound speed as an alternative to phantom dark energy
Raphaël Kou, Antony Lewis
Recent BAO measurements from DESI, when combined with CMB and supernovae data, suggest evolving dark energy and in particular point to a possible phantom regime, with an equation o…
astro-ph.CO2025
Improving CMB constraints on early Universe physics with LSS: A multi-probe forecast including cross-covariance
Raphaël Kou, Antony Lewis
Extensions to the model prior to recombination can modify the growth of perturbations around radiation-matter equality, leaving a distinct signature in the matter…
astro-ph.CO2025
A flexible parameterization to test early physics solutions to the Hubble tension with future CMB data
Raphaël Kou, Antony Lewis
One approach to reconciling local measurements of a high expansion rate with observations of acoustic oscillations in the CMB and galaxy clustering (the "Hubble tension") is to int…