- Centre National de la Recherche ScientifiqueFR640 papers
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4 papers · 2 filters
Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods
Shouvik Roy Choudhury, Steen Hannestad
In this work we update the bounds on from latest publicly available cosmological data and likelihoods using Bayesian analysis, while explicitly considering particular ne…
Fitting functions on the cheap: the relative nonlinear matter power spectrum
Steen Hannestad, Yvonne Y. Y. Wong
We propose an alternative approach to the construction of fitting functions to the nonlinear matter power spectrum extracted from -body simulations based on the relative matter…
Fully relativistic treatment of decaying cold dark matter in -body simulations
Jeppe Dakin, Steen Hannestad, Thomas Tram
We present -body simulations in which either all, or a fraction of, the cold dark matter decays non-relativistically to a relativistic, non-interacting dark radiation component.…
Dark energy perturbations in -body simulations
Jeppe Dakin, Steen Hannestad, Thomas Tram +2
We present -body simulations which are fully compatible with general relativity, with dark energy consistently included at both the background and perturbation level. We test ou…