output
19932026
Showing 2013 · astro-ph.COShow all

16 papers · 2 filters

astro-ph.CO2013

Neutrino physics from Cosmology

Steen Hannestad

In recent years precision cosmology has become an increasingly powerful probe of particle physics. Perhaps the prime example of this is the very stringent cosmological upper bound…

astro-ph.CO2013★ 154 cited

Updated constraints on non-standard neutrino interactions from Planck

Maria Archidiacono, Steen Hannestad

We provide updated bounds on non-standard neutrino interactions based on data from the Planck satellite as well as auxiliary cosmological measurements. Two types of models are stud…

astro-ph.CO2013★ 278 cited

On the Source of the Dust Extinction in Type Ia Supernovae and the Discovery of Anomalously Strong Na I Absorption

M. M. Phillips, Joshua D. Simon, Nidia Morrell +28

High-dispersion observations of the Na I D 5890, 5896 and K I 7665, 7699 interstellar lines, and the diffuse interstellar band at 5780 Angstroms in the spectra of 32 Type Ia supern…

astro-ph.CO2013★ 180 cited

How secret interactions can reconcile sterile neutrinos with cosmology

Steen Hannestad, Rasmus Sloth Hansen, Thomas Tram

Short baseline neutrino oscillation experiments have shown hints of the existence of additional sterile neutrinos in the eV mass range. However, such neutrinos seem incompatible wi…

astro-ph.CO2013★ 44 cited

A metallicity study of 1987A-like supernova host galaxies

F. Taddia, J. Sollerman, A. Razza +6

The origin of the blue supergiant (BSG) progenitor of Supernova (SN) 1987A has long been debated, along with the role that its sub-solar metallicity played. We now have a sample of…

astro-ph.CO2013★ 3 cited

Cosmic dark radiation and neutrinos

Maria Archidiacono, Elena Giusarma, Steen Hannestad +1

New measurements of the cosmic microwave background (CMB) by the Planck mission have greatly increased our knowledge about the Universe. Dark radiation, a weakly interacting compon…