181 citations · 727 across the 16 of their papers we have counts for
16 papers
The void-galaxy cross-correlation function with massive neutrinos and modified gravity
Renate Mauland, Øystein Elgarøy, David Fonseca Mota +1
Massive neutrinos and modified gravity have degenerate observational signatures that can impact the interpretation of results in galaxy survey experiments, such as cosmologi…
Quantized Vortices in Superfluid Dark Matter
Renate Mauland, Øystein Elgarøy
In 2015 Berezhiani & Khoury proposed a Superfluid Dark Matter (SFDM) model where dark matter condenses and forms a superfluid on galactic scales. In the superfluid state phonons in…
Reactor sterile neutrinos, dark energy and the age of the universe
Jostein R. Kristiansen, Oystein Elgaroy
There are indications that the neutrino oscillation data from reactor experiments and the LSND and MiniBooNE experiments show a preference for two sterile neutrino species, both wi…
Are all perturbations created equal? An analysis of the WMAP 5- and 7-year data without inflationary prejudice
Eirik Gjerløw, Øystein Elgarøy
We submit recent claims of a semi-significant detection of primordial tensor perturbations in the WMAP data to a closer scrutiny. Our conclusion is in brief that no such mode is pr…
Cosmological implications of the KATRIN experiment
Jostein R. Kristiansen, Oystein Elgaroy
The upcoming Karlsruhe Tritium Neutrino (KATRIN) experiment will put unprecedented constraints on the absolute mass of the electron neutrino, $\mnue$. In this paper we investigate…
Bayesian analysis of Friedmannless cosmologies
Oystein Elgaroy, Tuomas Multamaki
Assuming only a homogeneous and isotropic universe and using both the 'Gold' Supernova Type Ia sample of Riess et al. and the results from the Supernova Legacy Survey, we calculate…
Upper limits on neutrino masses from the 2dFGRS and WMAP: the role of priors
Oystein Elgaroy, Ofer Lahav
Solar, atmospheric, and reactor neutrino experiments have confirmed neutrino oscillations, implying that neutrinos have non-zero mass, but without pinning down their absolute masse…
A new upper limit on the total neutrino mass from the 2dF Galaxy Redshift Survey
O. Elgaroy, O. Lahav, W. J. Percival +27
We constrain f_nu = Omega_nu / Omega_m, the fractional contribution of neutrinos to the total mass density in the Universe, by comparing the power spectrum of fluctuations derived…
Superfluid vortices in neutron stars
O. Elgaroy, F. V. De Blasio
A microscopic, quantum mechanical model for neutron vortices in the crust of a neutron star is presented. After a brief introduction to the Bogoliubov- de Gennes equations, which f…
Microscopic structure of a vortex line in superfluid neutron star matter
F. V. De Blasio, O. Elgaroy
The microscopic structure of an isolated vortex line in superfluid neutron star matter is studied by solving the Bogoliubov-de Gennes equations. Our calculation, which is the start…
3P_2-3F_2 pairing in neutron matter with modern nucleon-nucleon potentials
M. Baldo, O. Elgaroey, L. Engvik +2
We present results for the pairing gap in neutron matter with several realistic nucleon-nucleon potentials, in particular with recent, phase-shift equivalent potent…
Minimal Relativity and - Pairing in Symmetric Nuclear Matter
Oe. Elgaroey, L. Engvik, E. Osnes +1
We present solutions of the coupled, non-relativistic - gap equations for neutron-proton pairing in symmetric nuclear matter, and estimate relativistic effects by sol…
Nucleon-Nucleon Phase Shifts and Pairing in Neutron Matter and Nuclear Matter
Oe. Elgaroey, M. Hjorth-Jensen
We consider 1S0 pairing in infinite neutron matter and nuclear matter and show that in the lowest order approximation, where the pairing interaction is taken to be the bare nucleon…
Model--space approach to neutron and proton pairing with the Bonn meson--exchange potentials
O. Elgaroy, L. Engvik, M. Hjorth-Jensen +1
In this work we calculate neutron and proton energy gaps in neutron star matter, using the Bonn meson--exchange interactions and a model--space approach to the gap equation. This a…
Muons and emissivities of neutrinos in neutron star cores
O. Elgaroy, L. Engvik, E. Osnes +3
In this work we consider the role of muons in various URCA processes relevant for neutrino emissions in the core region of neutron stars. The calculations are done for --stable…
Modern meson--exchange potential and superfluid neutron star crust matter
Oe. Elgaroey, L. Engvik, E. Osnes +3
In this work we study properties of neutron star crusts, where matter is expected to consist of nuclei surrounded by superfluid neutrons and a homogeneous background of relativisti…