Perturbations of the Robertson-Walker Space: Multicomponent Sources and Generalized Gravity
Abstract
Cosmological perturbation equations in the Robertson-Walker background applicable to some classes of generalized gravity theories, including multicomponent fluids and fields, are presented. The equations are expressed in a form which does not depend on the frame, and the adaptation of the equations into a particular gauge or into some gauge-invariant formulation becomes trivial. A generalization of formalism applicable to a variety of generalized gravity theories, including most of the gravity theories with scalar field and scalar curvature combination, is developed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1991
- DOI:
- 10.1086/170206
- Bibcode:
- 1991ApJ...375..443H
- Keywords:
-
- Gauge Invariance;
- Metric Space;
- Perturbation Theory;
- Relativity;
- Computational Astrophysics;
- Cosmochemistry;
- Field Theory (Physics);
- Scalars;
- Astrophysics;
- COSMOLOGY;
- GALAXIES: FORMATION;
- GRAVITATION;
- RELATIVITY