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Probing cosmological parameters with the CMB: Forecasts from full Monte Carlo simulations
Laurence Perotto, Julien Lesgourgues, Steen Hannestad +2
The Fisher matrix formalism has in recent times become the standard method for predicting the precision with which various cosmological parameters can be extracted from future data…
Isocurvature bounds on axions revisited
Maria Beltran, Juan Garcia-Bellido, Julien Lesgourgues
The axion is one of the best motivated candidates for particle dark matter. We study and update the constraints imposed by the recent CMB and LSS experiments on the mass of axions…
Can sterile neutrinos be ruled out as warm dark matter candidates?
Matteo Viel, Julien Lesgourgues, Martin G. Haehnelt +2
We present constraints on the mass of warm dark matter (WDM) particles from a combined analysis of the matter power spectrum inferred from the Sloan Digital Sky Survey \lya flux po…
Massive neutrinos and cosmology
Julien Lesgourgues, Sergio Pastor
The present experimental results on neutrino flavour oscillations provide evidence for non-zero neutrino masses, but give no hint on their absolute mass scale, which is the target…