173 citations · 218 across the 5 of their papers we have counts for
8 papers
Anisotropic solid dark energy
J. Motoa-Manzano, J. Bayron Orjuela-Quintana, Thiago S. Pereira +1
In this paper, we study a triad of inhomogeneous scalar fields, known as "solid", as a source of homogeneous but anisotropic dark energy. By using a dynamical system approach, we f…
Optimal Boltzmann hierarchies with non-vanishing spatial curvature
Cyril Pitrou, Thiago S. Pereira, Julien Lesgourgues
Within cosmological perturbation theory, the cosmic microwave background anisotropies are usually computed from a Boltzmann hierarchy coupled to the perturbed Einstein equations. I…
Extended FLRW Models: dynamical cancellation of cosmological anisotropies
Mikjel Thorsrud, Ben D. Normann, Thiago S. Pereira
We investigate a corner of the Bianchi models that has not received much attention: "extended FLRW models" (eFLRW) defined as a cosmological model with underlying anisotropic Bianc…
Beyond scalar, vector and tensor harmonics in maximally symmetric three-dimensional spaces
Cyril Pitrou, Thiago S. Pereira
We present a comprehensive construction of scalar, vector and tensor harmonics on maximally symmetric three-dimensional spaces. Our formalism relies on the introduction of spin-wei…
Topology and the suppression of CMB large-angle correlations
Armando Bernui, Camila P. Novaes, Thiago S. Pereira +1
To date, no compelling evidence has been found that the universe has non-trivial spatial topology. Meanwhile, anomalies in the observed CMB temperature map, such as the lack of cor…
Direction and redshift drifts for general observers and their applications in cosmology
Oton H. Marcori, Cyril Pitrou, Jean-Philippe Uzan +1
High precision astrometry now enables to measure the time drift of astrophysical observables in real time, hence providing new ways to probe different cosmological models. This art…