96 citations · 329 across the 11 of their papers we have counts for
8 papers · 1 filter
Axion hot dark matter bounds
G. Raffelt, S. Hannestad, A. Mirizzi +1
We derive cosmological limits on two-component hot dark matter consisting of neutrinos and axions. We restrict the large-scale structure data to the safely linear regime, excluding…
Global neutrino parameter estimation using Markov Chain Monte Carlo
Steen Hannestad
We present a Markov Chain Monte Carlo global analysis of neutrino parameters using both cosmological and experimental data. Results are presented for the combination of all present…
Unparticle constraints from SN1987A
Steen Hannestad, Georg Raffelt, Yvonne Y. Y. Wong
The existence of an unparticle sector, weakly coupled to the standard model, would have a profound impact on supernova (SN) physics. Emission of energy into the unparticle sector f…
The Matrix Reloaded - on the Dark Energy Seesaw
Kari Enqvist, Steen Hannestad, Martin S. Sloth
We propose a novel mechanism for dark energy, based on an extended seesaw for scalar fields, which does not require any new physics at energies below the TeV scale. A very light qu…
Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis
Rouzbeh Allahverdi, Steen Hannestad, Asko Jokinen +2
In general the gravitino mass and/or the soft supersymmetry breaking masses in the observable sector can be much larger than the TeV scale. Depending on the relation between the ma…
Recent Progress in Neutrino Astrophysics
Steen Hannestad
Recent progress in neutrino physics has been rapid, to a large extent thanks to observations of neutrinos produced in astrophysical environments. Here, we review the current standi…