9 papers
"Junk" DNA as a genetic decoy
Joao Magueijo
We propose that the evolutionary purpose of junk DNA is to protect the gene. Mutation agents, such as retro-viruses, hit ``decoy'' DNA most of the time. Although the argument is fa…
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…
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…
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…
Evidence for non-Gaussianity in the CMB
J. Magueijo, P. Ferreira, K. Gorski
In a recent Letter we have shown how COBE-DMR maps may be used to disprove Gaussianity at a high confidence level. In this report we digress on a few issues closely related to this…
CMB and LSS Power Spectra From Local Cosmic String Seeded Struture Formation
Carlo R. Contaldi, Mark Hindmarsh, Joao Magueijo
We evaluate the two point functions of the stress energy from the largest string simulations carried out so far. The two point functions are used to calculate the cosmic microwave…