Professor Pedro Ferreira: Publications

Non-Gaussian spectra in cosmic microwave background temperature anisotropies

PHYSICAL REVIEW D 55:6 (1997) 3358-3372

Authors:

PG Ferreira, J Magueijo

Polarization-temperature correlation from a primordial magnetic field

PHYSICAL REVIEW D 56:12 (1997) R7493-R7497

Authors:

ES Scannapieco, PG Ferreira

Structure formation with a self-tuning scalar field

PHYSICAL REVIEW LETTERS 79:24 (1997) 4740-4743

Authors:

PG Ferreira, M Joyce

Non-Gaussian Spectra

(1996)

Authors:

Pedro G Ferreira, Joao Magueijo

How Anisotropic is our Universe?

Phys.Rev.Lett. 77 (1996) 2883-2886

Authors:

EF Bunn, P Ferreira, J Silk

Abstract:

Large-scale cosmic microwave background anisotropies in homogeneous, globally anisotropic cosmologies are investigated. We perform a statistical analysis in which the four-year data from the Cosmic Background Explorer satellite is searched for the specific anisotropy patterns predicted by these models and thereby set definitive upper limits on the amount of shear, $(\sigma/H)_0$ and vorticity, $(\omega/H)_0$, which are orders of magnitude stronger than previous constraints. We comment on how these results might impact our understanding of primordial global anisotropy.

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