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- Centre National de la Recherche ScientifiqueFR640 papers
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9 papers · 2 filters
Updated constraints on massive neutrino self-interactions from cosmology in light of the tension
Shouvik Roy Choudhury, Steen Hannestad, Thomas Tram
We have updated the constraints on flavour universal neutrino self-interactions mediated by a heavy scalar, in the effective 4-fermion interaction limit. We use the relaxation time…
The full Boltzmann hierarchy for dark matter-massive neutrino interactions
Markus R. Mosbech, Celine Boehm, Steen Hannestad +3
The impact of dark matter-neutrino interactions on the measurement of the cosmological parameters has been investigated in the past in the context of massless neutrinos exclusively…
Updated constraints on decaying cold dark matter
Andreas Nygaard, Thomas Tram, Steen Hannestad
In this paper we update the constraints on the simple decaying cold dark matter (DCDM) model with dark radiation (DR) as decay product. We consider two different regimes of the lif…
Invisible neutrino decay in precision cosmology
Gabriela Barenboim, Joe Zhiyu Chen, Steen Hannestad +3
We revisit the topic of invisible neutrino decay in the precision cosmological context, via a first-principles approach to understanding the cosmic microwave background and large-s…
Euclid: impact of nonlinear prescriptions on cosmological parameter estimation from weak lensing cosmic shear
M. Martinelli, I. Tutusaus, M. Archidiacono +91
Upcoming surveys will map the growth of large-scale structure with unprecented precision, improving our understanding of the dark sector of the Universe. Unfortunately, much of the…
Euclid preparation: IX. EuclidEmulator2 -- Power spectrum emulation with massive neutrinos and self-consistent dark energy perturbations
Euclid Collaboration, M. Knabenhans, J. Stadel +131
We present a new, updated version of the EuclidEmulator (called EuclidEmulator2), a fast and accurate predictor for the nonlinear correction of the matter power spectrum. Percent-l…