1.2k citations · 9.6k across the 168 of their papers we have counts for
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Stars and black holes in varying speed of light theories
Joao Magueijo
We investigate spherically symmetric solutions to a recently proposed covariant and locally Lorentz-invariant varying speed of light theory. We find the metrics and variations in $…
The Complete Bispectrum of COBE-DMR Four Year Maps
H. B. Sandvik, J. Magueijo
We extend a previous bispectrum analysis of the COBE-DMR 4 year maps, allowing for the presence of correlations between all possible angular scales. We find that the non-Gaussian s…
Bayesian joint estimation of non-Gaussianity and the power spectrum
Graca Rocha, Joao Magueijo, Mike Hobson +1
We propose a rigorous, non-perturbative, Bayesian framework which enables one jointly to test Gaussianity and estimate the power spectrum of CMB anisotropies. It makes use of the H…
Covariant and locally Lorentz-invariant varying speed of light theories
Joao Magueijo
We propose definitions for covariance and local Lorentz invariance applicable when the speed of light is allowed to vary. They have the merit of retaining only those aspects of…
Dilaton-derived quintessence scenario leading naturally to the late-time acceleration of the Universe
Rachel Bean, Joao Magueijo
Quintessence scenarios provide a simple explanation for the observed acceleration of the Universe. Yet, explaining why acceleration did not start a long time ago remains a challeng…
Can the Universe escape eternal acceleration?
John Barrow, Rachel Bean, Joao Magueijo
Recent astronomical observations of distant supernovae light-curves suggest that the expansion of the universe has recently begun to accelerate. Acceleration is created by an anti-…
Cosmic defects and cosmology
Joao Magueijo, Robert Brandenberger
We provide a pedagogical overview of defect models of structure formation. We first introduce the concept of topological defect, and describe how to classify them. We then show how…