532 citations · 11.7k across the 196 of their papers we have counts for
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Introduction to neutrino cosmology
Steen Hannestad
I review the basics of neutrino cosmology, from the question of neutrino decoupling and the presence of sterile neutrinos to the effects of neutrinos on the cosmic microwave backgr…
New constraint on the cosmological background of relativistic particles
Steen Hannestad
We have derived new bounds on the relativistic energy density in the Universe from cosmic microwave background (CMB), large scale structure (LSS), and type Ia supernova (SNI-a) obs…
Constraining invisible neutrino decays with the cosmic microwave background
Steen Hannestad, Georg Raffelt
Precision measurements of the acoustic peaks of the cosmic microwave background indicate that neutrinos must be freely streaming at the photon decoupling epoch when T ~ 0.3 eV. Thi…
Dark energy and dark matter from cosmological observations
Steen Hannestad
The present status of our knowledge about the dark matter and dark energy is reviewed. Bounds on the content of cold and hot dark matter from cosmological observations are discusse…
Is it possible to tell the difference between fermionic and bosonic hot dark matter?
Steen Hannestad, Andreas Ringwald, Huitzu Tu +1
We study the difference between thermally produced fermionic and bosonic hot dark matter in detail. In the linear regime of structure formation, their distinct free-streaming behav…
Neutrino masses and the dark energy equation of state - relaxing the cosmological neutrino mass bound
Steen Hannestad
Cosmology at present provides the nominally strongest constraint on the masses of standard model neutrinos. However, this constraint extremely dependent on the nature of the dark e…