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Dark Coupling and Gauge Invariance
We study a coupled dark energy-dark matter model in which the energy-momentum exchange is proportional to the Hubble expansion rate. The inclusion of its perturbation is required by gauge invariance. We derive the linear perturbation equations for the gauge invariant energy density contrast and velo...
| Autores principales: | , , , |
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| Formato: | info:eu-repo/semantics/article |
| Lenguaje: | eng |
| Publicado: |
2010
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/1263511 |