153 citations · 636 across the 9 of their papers we have counts for
9 papers
Apparent Dark-Energy Evolution from Cosmic Inhomogeneities
Yonadav Barry Ginat, Pedro G. Ferreira
A mildly inhomogeneous universe with a cosmological constant may look like it contains evolving dark energy. We show that could be the case by modelling the inhomogeneities and the…
COrE (Cosmic Origins Explorer) A White Paper
The COrE Collaboration, C. Armitage-Caplan, M. Avillez +72
COrE (Cosmic Origins Explorer) is a fourth-generation full-sky, microwave-band satellite recently proposed to ESA within Cosmic Vision 2015-2025. COrE will provide maps of the micr…
Vector field models of modified gravity and the dark sector
J. Zuntz, T. G. Zlosnik, F. Bourliot +2
We present a comprehensive investigation of cosmological constraints on the class of vector field formulations of modified gravity called Generalized Einstein-Aether models. Using…
Fast and precise map-making for massively multi-detector CMB experiments
D. Sutton, J. A. Zuntz, P. G. Ferreira +6
Future cosmic microwave background (CMB) polarisation experiments aim to measure an unprecedentedly small signal - the primordial gravity wave component of the polarisation field B…
Constraining Lorentz violation with cosmology
J. A. Zuntz, P. G. Ferreira, T. G. Zlosnik
The Einstein-Aether theory provides a simple, dynamical mechanism for breaking Lorentz invariance. It does so within a generally covariant context and may emerge from quantum effec…
The Vector-Tensor nature of Bekenstein's relativistic theory of Modified Gravity
T. G. Zlosnik, P. G. Ferreira, Glenn D. Starkman
Bekenstein's theory of relativistic gravity is conventionally written as a bi-metric theory. The two metrics are related by a disformal transformation defined by a dynamical vector…
Constraints on the Electrical Charge Asymmetry of the Universe
C. Caprini, P. G. Ferreira
We use the isotropy of the Cosmic Microwave Background to place stringent constraints on a possible electrical charge asymmetry of the universe. We find the excess charge per baryo…
Tensor Microwave Anisotropies from a Stochastic Magnetic Field
R. Durrer, P. G. Ferreira, T. Kahniashvili
We derive an expression for the angular power spectrum of cosmic microwave background anisotropies due to gravity waves generated by a stochastic magnetic field and compare the res…
Cosmic Strings in an Open Universe with Baryonic and Non-Baryonic Dark Matter
Pedro Ferreira
We study the effects of cosmic strings on structure formation in open universes. We calculate the power spectrum of density perturbations for two class of models: one in which all…