Unimodular Gravity and Averaging
| Autor: | Alan Coley, Joey Latta, Johan Brannlund |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Physics
Gravity (chemistry) 010308 nuclear & particles physics FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics General Relativity and Quantum Cosmology (gr-qc) Curvature 01 natural sciences General Relativity and Quantum Cosmology Cosmology Interpretation (model theory) Term (time) Theoretical physics Unimodular matrix 0103 physical sciences Evolution equation 010306 general physics |
| DOI: | 10.48550/arxiv.1102.3456 |
| Popis: | The question of the averaging of inhomogeneous spacetimes in cosmology is important for the correct interpretation of cosmological data. In this paper we suggest a conceptually simpler approach to averaging in cosmology based on the averaging of scalars within unimodular gravity. As an illustration, we consider the example of an exact spherically symmetric dust model, and show that within this approach averaging introduces correlations (corrections) to the effective dynamical evolution equation in the form of a spatial curvature term. Comment: 10 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|