696 citations · 3.4k across the 56 of their papers we have counts for
5 papers · 2 filters
Cosmological parameters from lensed supernovae
A. Goobar, E. Mortsell, R. Amanullah +1
We investigate the possibility of measuring the Hubble constant, the fractional energy density components and the equation of state parameter of the ``dark energy'' using lensed mu…
SNOC: a Monte-Carlo simulation package for high-z supernova observations
A. Goobar, E. Mortsell, R. Amanullah +3
We present a Monte-Carlo package for simulation of high-redshift supernova data, SNOC. Optical and near-infrared photons from supernovae are ray-traced over cosmological distances…
Probing the dark side: Constraints on the dark energy equation of state from CMB, large scale structure and Type Ia supernovae
Steen Hannestad, Edvard Mortsell
We have reanalysed constraints on the equation of state parameter, w_Q = P/rho, of the dark energy, using several cosmological data sets and relaxing the usual constraint w_Q > -1.…
Correcting for lensing bias in the Hubble diagram
R. Amanullah, E. Mortsell, A. Goobar
Gravitational lensing will cause a dispersion in the Hubble diagram for high redshift sources. This effect will introduce a bias in the cosmological parameter determination using t…
Photon-axion oscillations and Type Ia supernovae
Edvard Mortsell, Lars Bergstrom, Ariel Goobar
We compute the probability of photon-axion oscillations in the presence of both intergalactic magnetic fields and an electron plasma and investigate the effect on Type Ia supernova…