3 papers
astro-ph.CO2025
A primordial origin to cosmic tensions: towards reconciling and with early dark energy and scale-dependent primordial non-Gaussianities
Clément Stahl, Vivian Poulin, Benoit Famaey +1
The Hubble () tension between direct measurements of the expansion rate and the prediction of the CDM cosmological model calibrated on the Cosmic Microwave Background (CMB…
astro-ph.CO2025
Primordial Sharp Features through the Nonlinear Regime of Structure Formation
Clément Stahl, Denis Werth, Vivian Poulin
Sudden violations of the slow-roll regime during inflation, a natural prediction of many UV-complete inflationary models, give rise to sharp features in the primordial power spectr…
astro-ph.CO2025
A cosmic degeneracy story: structure formation with warm dark matter and scale-dependent primordial non-Gaussianities
Clément Stahl, Benoit Famaey, Rodrigo Ibata +2
It has been recently shown that cosmological models with scale-dependent primordial non-Gaussianities (sPNG) could provide a possible path to solve current cosmic tensions. Moreove…