Scalar perturbations in a Friedmann-like metric with non-null Weyl tensor
| Autor: | J. M. Salim, Eduardo Bittencourt, Grasiele B. Santos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Weyl tensor
Physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) General relativity Scalar (mathematics) FOS: Physical sciences Astronomy and Astrophysics General Relativity and Quantum Cosmology (gr-qc) Curvature General Relativity and Quantum Cosmology symbols.namesake Einstein field equations symbols Cosmological perturbation theory Covariant transformation Gauge theory Mathematical physics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | In a previous work the authors have solved the Einstein equations of General Relativity for a class of metrics with constant spatial curvature, where it was found a non vanishing Weyl tensor in the presence of a primordial magnetic field with an anisotropic pressure component. Here, we perform the perturbative analysis of this model in order to study the gravitational stability under linear scalar perturbations. For this purpose, we take the Quasi-Maxwellian formalism of General Relativity as our framework, which offers a naturally covariant and gauge-invariant approach to deal with perturbations that are directly linked to observational quantities. 14 pages, 1 figure, improved version with a new analysis of the large wavelength limit. The current version matches the published one |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|