82 citations · 205 across the 7 of their papers we have counts for
11 papers · 1 filter
Perihelion precession in spherically symmetric Kaluza-Klein theories
Oystein Elgaroy, Oyvind Gron, Sigbjorn Hervik
We consider the perihelion precession and bending of light in a class of Kaluza-Klein models and show that the "electric redshift" model, proposed in Zhang (2006) to explain the re…
Detection of transplanckian effects in the cosmic microwave background
Nicolaas E. Groeneboom, Oystein Elgaroy
Quantum gravity effects are expected to modify the primordial density fluctuations produced during inflation and leave their imprint on the cosmic microwave background observed tod…
Neutrino Mass, Dark Energy, and the Linear Growth Factor
Angeliki Kiakotou, Oystein Elgaroy, Ofer Lahav
We study the degeneracies between neutrino mass and dark energy as they manifest themselves in cosmological observations. In contradiction to a popular formula in the literature, t…
On using the CMB shift parameter in tests of models of dark energy
Oystein Elgaroy, Tuomas Multamaki
The so-called shift parameter is related to the position of the first acoustic peak in the power spectrum anisotropies of the cosmic microwave background (CMB) anisotropies. It is…
Using the cluster mass function from weak lensing to constrain neutrino masses
Jostein R. Kristiansen, Oystein Elgaroy, Hakon Dahle
We discuss the variation of cosmological upper bounds on , the sum of the neutrino masses, with the choice of data sets included in the analysis, pointing out a few oddities n…
Revised WMAP constraints on neutrino masses and other extensions of the minimal CDM model
Jostein R. Kristiansen, Hans Kristian Eriksen, Oystein Elgaroy
Recently, two issues concerning the three-year WMAP likelihood code were pointed out. On large angular scales (), a sub-optimal likelihood approximation resulted in…