1.2k citations · 9.6k across the 168 of their papers we have counts for
13 papers · 1 filter
Imaginative Cosmology
Robert H. Brandenberger, Joao Magueijo
We review a few off-the-beaten-track ideas in cosmology. They solve a variety of fundamental problems; also they are fun. We start with a description of non-singular dilaton cosmol…
New non-Gaussian feature in COBE-DMR Four Year Maps
Joao Magueijo
We extend a previous bispectrum analysis of the Cosmic Microwave Background temperature anisotropy, allowing for the presence of correlations between different angular scales. We f…
Photographing the wave function of the Universe
C. R. Contaldi, R. Bean, J. Magueijo
We show that density fluctuations in standard inflationary scenarios may take the most general non-Gaussian distribution if the wave function of the Universe is not in the ground s…
A Bayesian estimate of the skewness of the Cosmic Microwave Background
C. R. Contaldi, P. G. Ferreira, J. Magueijo +1
We propose a formalism for estimating the skewness and angular power spectrum of a general Cosmic Microwave Background data set. We use the Edgeworth Expansion to define a non-Gaus…
Can a changing explain the Supernovae results?
John D. Barrow, Joao Magueijo
We show that the Supernovae results, implying evidence for an accelerating Universe, may be closely related to the recent discovery of redshift dependence in the fine structure con…
Early structure formation with cold plus hot dark matter --- a success of strings plus inflation model
Richard A. Battye, Joao Magueijo, Jochen Weller
Quantum fluctuations created during inflation can account for the observed matter distribution in the linear regime if the universe has two components of dark matter, one which is…
Big Bang riddles and their revelations
Joao Magueijo, Kim Baskerville
We describe how cosmology has converged towards a beautiful model of the Universe: the Big Bang Universe. We praise this model, but show there is a dark side to it. This dark side…
The statistical physics of cosmological networks of string loops
Joao Magueijo, Haavard Sandvik, Daniele Steer
We solve numerically the Boltzmann equation describing the evolution of a cosmic string network which contains only loops. In Minkowski space time the equilibrium solution predicte…
The 4 Year COBE DMR data is non-Gaussian
P. G. Ferreira, K. M. Gorski, J. Magueijo
I review our recent claim that there is evidence of non-Gaussianity in the 4 Year COBE DMR data. I describe the statistic we apply, the result we obtain and make a detailed list of…
Where is the COBE maps' non-Gaussianity?
Joao Magueijo, Pedro G. Ferreira, Krzysztof M. Gorski
We review our recent claim that there is evidence of non-Gaussianity in the 4 Year COBE DMR data. We present some new results concerning the effect of the galactic cut upon the non…
Structure formation with strings plus inflation: a new paradigm
Joao Magueijo, Carlo Contaldi, Mark Hindmarsh
Recent developments in inflation model building, based on supersymmetry, have produced compelling models in which strings are produced at the end of inflation. In such models the c…
Cosmological parameter dependence in local string theories of structure formation
E. J. Copeland, Joao Magueijo, D. A. Steer
We perform a new and accurate study of the dependence on cosmological parameters of structure formation with local cosmic strings. The crucial new ingredients are the inclusion of…
Solving the Flatness and Quasi-flatness Problems in Brans-Dicke Cosmologies with a Varying Light Speed
John D. Barrow, Joao Magueijo
We define the flatness and quasi-flatness problems in cosmological models. We seek solutions to both problems in homogeneous and isotropic Brans-Dicke cosmologies with varying spee…